diff --git a/code/ZAS/Atom.dm b/code/ZAS/Atom.dm
index ce69ad7162..4961355940 100644
--- a/code/ZAS/Atom.dm
+++ b/code/ZAS/Atom.dm
@@ -57,11 +57,11 @@ turf/c_airblock(turf/other)
 	#ifdef ZASDBG
 	ASSERT(isturf(other))
 	#endif
-	if(blocks_air || other.blocks_air)
+	if(((blocks_air & AIR_BLOCKED) || (other.blocks_air & AIR_BLOCKED)))
 		return BLOCKED
 
 	//Z-level handling code. Always block if there isn't an open space.
-	#ifdef ZLEVELS
+	#ifdef MULTIZAS
 	if(other.z != src.z)
 		if(other.z < src.z)
 			if(!istype(src, /turf/simulated/open)) return BLOCKED
@@ -69,6 +69,12 @@ turf/c_airblock(turf/other)
 			if(!istype(other, /turf/simulated/open)) return BLOCKED
 	#endif
 
+	if(((blocks_air & ZONE_BLOCKED) || (other.blocks_air & ZONE_BLOCKED)))
+		if(z == other.z)
+			return ZONE_BLOCKED
+		else
+			return AIR_BLOCKED
+
 	var/result = 0
 	for(var/atom/movable/M in contents)
 		result |= M.c_airblock(other)
diff --git a/code/ZAS/ConnectionManager.dm b/code/ZAS/ConnectionManager.dm
index 1c101f4b45..28ef365830 100644
--- a/code/ZAS/ConnectionManager.dm
+++ b/code/ZAS/ConnectionManager.dm
@@ -37,7 +37,7 @@ Class Procs:
 /connection_manager/var/connection/E
 /connection_manager/var/connection/W
 
-#ifdef ZLEVELS
+#ifdef MULTIZAS
 /connection_manager/var/connection/U
 /connection_manager/var/connection/D
 #endif
@@ -57,7 +57,7 @@ Class Procs:
 			if(check(W)) return W
 			else return null
 
-		#ifdef ZLEVELS
+		#ifdef MULTIZAS
 		if(UP)
 			if(check(U)) return U
 			else return null
@@ -73,7 +73,7 @@ Class Procs:
 		if(EAST) E = c
 		if(WEST) W = c
 
-		#ifdef ZLEVELS
+		#ifdef MULTIZAS
 		if(UP) U = c
 		if(DOWN) D = c
 		#endif
@@ -83,7 +83,7 @@ Class Procs:
 	if(check(S)) S.update()
 	if(check(E)) E.update()
 	if(check(W)) W.update()
-	#ifdef ZLEVELS
+	#ifdef MULTIZAS
 	if(check(U)) U.update()
 	if(check(D)) D.update()
 	#endif
@@ -93,7 +93,7 @@ Class Procs:
 	if(check(S)) S.erase()
 	if(check(E)) E.erase()
 	if(check(W)) W.erase()
-	#ifdef ZLEVELS
+	#ifdef MULTIZAS
 	if(check(U)) U.erase()
 	if(check(D)) D.erase()
 	#endif
diff --git a/code/ZAS/Controller.dm b/code/ZAS/Controller.dm
index cfd6cff414..2469f7a36f 100644
--- a/code/ZAS/Controller.dm
+++ b/code/ZAS/Controller.dm
@@ -158,6 +158,9 @@ Total Unsimulated Turfs: [world.maxx*world.maxy*world.maxz - simulated_turf_coun
 		//defer updating of self-zone-blocked turfs until after all other turfs have been updated.
 		//this hopefully ensures that non-self-zone-blocked turfs adjacent to self-zone-blocked ones
 		//have valid zones when the self-zone-blocked turfs update.
+
+		//This ensures that doorways don't form their own single-turf zones, since doorways are self-zone-blocked and
+		//can merge with an adjacent zone, whereas zones that are formed on adjacent turfs cannot merge with the doorway.
 		var/list/deferred = list()
 
 		for(var/turf/T in updating)
diff --git a/code/ZAS/Diagnostic.dm b/code/ZAS/Diagnostic.dm
index ed94b7d582..10ec2e731b 100644
--- a/code/ZAS/Diagnostic.dm
+++ b/code/ZAS/Diagnostic.dm
@@ -39,6 +39,10 @@ client/proc/Test_ZAS_Connection(var/turf/simulated/T as turf)
 	"South" = SOUTH,\
 	"East" = EAST,\
 	"West" = WEST,\
+	#ifdef MULTIZAS
+	"Up" = UP,\
+	"Down" = DOWN,\
+	#endif
 	"N/A" = null)
 	var/direction = input("What direction do you wish to test?","Set direction") as null|anything in direction_list
 	if(!direction)
diff --git a/code/ZAS/Turf.dm b/code/ZAS/Turf.dm
index 62cad5e469..bb5eb5050e 100644
--- a/code/ZAS/Turf.dm
+++ b/code/ZAS/Turf.dm
@@ -16,7 +16,7 @@
 		//dbg(blocked)
 		return 1
 
-	#ifdef ZLEVELS
+	#ifdef MULTIZAS
 	for(var/d = 1, d < 64, d *= 2)
 	#else
 	for(var/d = 1, d < 16, d *= 2)
@@ -52,34 +52,40 @@
 */
 
 /turf/simulated/proc/can_safely_remove_from_zone()
-	#ifdef ZLEVELS
-	return 0 //TODO generalize this to multiz.
-	#else
-	
+
+
 	if(!zone) return 1
-	
+
 	var/check_dirs = get_zone_neighbours(src)
 	var/unconnected_dirs = check_dirs
-	
-	for(var/dir in list(NORTHWEST, NORTHEAST, SOUTHEAST, SOUTHWEST))
-		
+
+	#ifdef MULTIZAS
+	var/to_check = cornerdirsz
+	#else
+	var/to_check = cornerdirs
+	#endif
+
+	for(var/dir in to_check)
 		//for each pair of "adjacent" cardinals (e.g. NORTH and WEST, but not NORTH and SOUTH)
 		if((dir & check_dirs) == dir)
 			//check that they are connected by the corner turf
 			var/connected_dirs = get_zone_neighbours(get_step(src, dir))
-			if(connected_dirs && (dir & turn(connected_dirs, 180)) == dir)
+			if(connected_dirs && (dir & reverse_dir[connected_dirs]) == dir)
 				unconnected_dirs &= ~dir //they are, so unflag the cardinals in question
-	
+
 	//it is safe to remove src from the zone if all cardinals are connected by corner turfs
 	return !unconnected_dirs
-	
-	#endif
 
 //helper for can_safely_remove_from_zone()
 /turf/simulated/proc/get_zone_neighbours(turf/simulated/T)
 	. = 0
 	if(istype(T) && T.zone)
-		for(var/dir in cardinal)
+		#ifdef MULTIZAS
+		var/to_check = cardinalz
+		#else
+		var/to_check = cardinal
+		#endif
+		for(var/dir in to_check)
 			var/turf/simulated/other = get_step(T, dir)
 			if(istype(other) && other.zone == T.zone && !(other.c_airblock(T) & AIR_BLOCKED) && get_dist(src, other) <= 1)
 				. |= dir
@@ -98,7 +104,7 @@
 		#endif
 		if(zone)
 			var/zone/z = zone
-			
+
 			if(can_safely_remove_from_zone()) //Helps normal airlocks avoid rebuilding zones all the time
 				z.remove(src)
 			else
@@ -110,7 +116,7 @@
 	open_directions = 0
 
 	var/list/postponed
-	#ifdef ZLEVELS
+	#ifdef MULTIZAS
 	for(var/d = 1, d < 64, d *= 2)
 	#else
 	for(var/d = 1, d < 16, d *= 2)
@@ -161,7 +167,7 @@
 				//Might have assigned a zone, since this happens for each direction.
 				if(!zone)
 
-					//We do not merge if 
+					//We do not merge if
 					//    they are blocking us and we are not blocking them, or if
 					//    we are blocking them and not blocking ourselves - this prevents tiny zones from forming on doorways.
 					if(((block & ZONE_BLOCKED) && !(r_block & ZONE_BLOCKED)) || ((r_block & ZONE_BLOCKED) && !(s_block & ZONE_BLOCKED)))
diff --git a/code/ZAS/_docs.dm b/code/ZAS/_docs.dm
index 1f652ffaab..4433478e32 100644
--- a/code/ZAS/_docs.dm
+++ b/code/ZAS/_docs.dm
@@ -28,8 +28,7 @@ Notes for people who used ZAS before:
 */
 
 //#define ZASDBG
-//#define ZLEVELS
-
+//#define MULTIZAS
 #define AIR_BLOCKED 1
 #define ZONE_BLOCKED 2
 #define BLOCKED 3
diff --git a/code/controllers/configuration.dm b/code/controllers/configuration.dm
index 57f2247255..5021453462 100644
--- a/code/controllers/configuration.dm
+++ b/code/controllers/configuration.dm
@@ -166,6 +166,7 @@ var/list/gamemode_cache = list()
 	var/simultaneous_pm_warning_timeout = 100
 
 	var/use_recursive_explosions //Defines whether the server uses recursive or circular explosions.
+	var/multi_z_explosion_scalar = 0.5 //Multiplier for how much weaker explosions are on neighboring z levels.
 
 	var/assistant_maint = 0 //Do assistants get maint access?
 	var/gateway_delay = 18000 //How long the gateway takes before it activates. Default is half an hour.
@@ -283,6 +284,9 @@ var/list/gamemode_cache = list()
 				if ("use_recursive_explosions")
 					use_recursive_explosions = 1
 
+				if ("multi_z_explosion_scalar")
+					multi_z_explosion_scalar = text2num(value)
+
 				if ("log_ooc")
 					config.log_ooc = 1
 
diff --git a/code/game/objects/explosion.dm b/code/game/objects/explosion.dm
index b081530e10..dd18925da2 100644
--- a/code/game/objects/explosion.dm
+++ b/code/game/objects/explosion.dm
@@ -1,23 +1,26 @@
 //TODO: Flash range does nothing currently
 
-proc/explosion(turf/epicenter, devastation_range, heavy_impact_range, light_impact_range, flash_range, adminlog = 1, z_transfer = UP|DOWN)
+proc/explosion(turf/epicenter, devastation_range, heavy_impact_range, light_impact_range, flash_range, adminlog = 1, z_transfer = UP|DOWN, shaped)
+	var/multi_z_scalar = config.multi_z_explosion_scalar
 	src = null	//so we don't abort once src is deleted
 	spawn(0)
-		if(config.use_recursive_explosions)
-			var/power = devastation_range * 2 + heavy_impact_range + light_impact_range //The ranges add up, ie light 14 includes both heavy 7 and devestation 3. So this calculation means devestation counts for 4, heavy for 2 and light for 1 power, giving us a cap of 27 power.
-			explosion_rec(epicenter, power)
-			return
-
 		var/start = world.timeofday
 		epicenter = get_turf(epicenter)
 		if(!epicenter) return
 
 		// Handles recursive propagation of explosions.
-		if(devastation_range > 2 || heavy_impact_range > 2)
-			if(HasAbove(epicenter.z) && z_transfer & UP)
-				explosion(GetAbove(epicenter), max(0, devastation_range - 2), max(0, heavy_impact_range - 2), max(0, light_impact_range - 2), max(0, flash_range - 2), 0, UP)
-			if(HasBelow(epicenter.z) && z_transfer & DOWN)
-				explosion(GetAbove(epicenter), max(0, devastation_range - 2), max(0, heavy_impact_range - 2), max(0, light_impact_range - 2), max(0, flash_range - 2), 0, DOWN)
+		if(z_transfer && multi_z_scalar)
+			var/adj_dev   = max(0, (multi_z_scalar * devastation_range) - (shaped ? 2 : 0) )
+			var/adj_heavy = max(0, (multi_z_scalar * heavy_impact_range) - (shaped ? 2 : 0) )
+			var/adj_light = max(0, (multi_z_scalar * light_impact_range) - (shaped ? 2 : 0) )
+			var/adj_flash = max(0, (multi_z_scalar * flash_range) - (shaped ? 2 : 0) )
+
+
+			if(adj_dev > 0 || adj_heavy > 0)
+				if(HasAbove(epicenter.z) && z_transfer & UP)
+					explosion(GetAbove(epicenter), round(adj_dev), round(adj_heavy), round(adj_light), round(adj_flash), 0, UP, shaped)
+				if(HasBelow(epicenter.z) && z_transfer & DOWN)
+					explosion(GetBelow(epicenter), round(adj_dev), round(adj_heavy), round(adj_light), round(adj_flash), 0, DOWN, shaped)
 
 		var/max_range = max(devastation_range, heavy_impact_range, light_impact_range, flash_range)
 
@@ -30,31 +33,20 @@ proc/explosion(turf/epicenter, devastation_range, heavy_impact_range, light_impa
 		far_dist += devastation_range * 20
 		var/frequency = get_rand_frequency()
 		for(var/mob/M in player_list)
-			// Double check for client
-			if(M && M.client)
+			if(M.z == epicenter.z)
 				var/turf/M_turf = get_turf(M)
-				if(M_turf && M_turf.z == epicenter.z)
-					var/dist = get_dist(M_turf, epicenter)
-					// If inside the blast radius + world.view - 2
-					if(dist <= round(max_range + world.view - 2, 1))
-						M.playsound_local(epicenter, get_sfx("explosion"), 100, 1, frequency, falloff = 5) // get_sfx() is so that everyone gets the same sound
+				var/dist = get_dist(M_turf, epicenter)
+				// If inside the blast radius + world.view - 2
+				if(dist <= round(max_range + world.view - 2, 1))
+					M.playsound_local(epicenter, get_sfx("explosion"), 100, 1, frequency, falloff = 5) // get_sfx() is so that everyone gets the same sound
+				else if(dist <= far_dist)
+					var/far_volume = Clamp(far_dist, 30, 50) // Volume is based on explosion size and dist
+					far_volume += (dist <= far_dist * 0.5 ? 50 : 0) // add 50 volume if the mob is pretty close to the explosion
+					M.playsound_local(epicenter, 'sound/effects/explosionfar.ogg', far_volume, 1, frequency, falloff = 5)
 
-						//You hear a far explosion if you're outside the blast radius. Small bombs shouldn't be heard all over the station.
-
-					else if(dist <= far_dist)
-						var/far_volume = Clamp(far_dist, 30, 50) // Volume is based on explosion size and dist
-						far_volume += (dist <= far_dist * 0.5 ? 50 : 0) // add 50 volume if the mob is pretty close to the explosion
-						M.playsound_local(epicenter, 'sound/effects/explosionfar.ogg', far_volume, 1, frequency, falloff = 5)
-
-		var/close = range(world.view+round(devastation_range,1), epicenter)
-		// to all distanced mobs play a different sound
-		for(var/mob/M in world) if(M.z == epicenter.z) if(!(M in close))
-			// check if the mob can hear
-			if(M.ear_deaf <= 0 || !M.ear_deaf) if(!istype(M.loc,/turf/space))
-				M << 'sound/effects/explosionfar.ogg'
 		if(adminlog)
-			message_admins("Explosion with size ([devastation_range], [heavy_impact_range], [light_impact_range]) in area [epicenter.loc.name] ([epicenter.x],[epicenter.y],[epicenter.z]) (<A HREF='?_src_=holder;adminplayerobservecoodjump=1;X=[epicenter.x];Y=[epicenter.y];Z=[epicenter.z]'>JMP</a>)")
-			log_game("Explosion with size ([devastation_range], [heavy_impact_range], [light_impact_range]) in area [epicenter.loc.name] ")
+			message_admins("Explosion with [shaped ? "shaped" : "non-shaped"] size ([devastation_range], [heavy_impact_range], [light_impact_range]) in area [epicenter.loc.name] ([epicenter.x],[epicenter.y],[epicenter.z]) (<A HREF='?_src_=holder;adminplayerobservecoodjump=1;X=[epicenter.x];Y=[epicenter.y];Z=[epicenter.z]'>JMP</a>)")
+			log_game("Explosion with [shaped ? "shaped" : "non-shaped"] size ([devastation_range], [heavy_impact_range], [light_impact_range]) in area [epicenter.loc.name] ")
 
 		var/approximate_intensity = (devastation_range * 3) + (heavy_impact_range * 2) + light_impact_range
 		var/powernet_rebuild_was_deferred_already = defer_powernet_rebuild
@@ -70,41 +62,42 @@ proc/explosion(turf/epicenter, devastation_range, heavy_impact_range, light_impa
 		var/x0 = epicenter.x
 		var/y0 = epicenter.y
 		var/z0 = epicenter.z
+		if(config.use_recursive_explosions)
+			var/power = devastation_range * 2 + heavy_impact_range + light_impact_range //The ranges add up, ie light 14 includes both heavy 7 and devestation 3. So this calculation means devestation counts for 4, heavy for 2 and light for 1 power, giving us a cap of 27 power.
+			explosion_rec(epicenter, power, shaped)
+		else
+			for(var/turf/T in trange(max_range, epicenter))
+				var/dist = sqrt((T.x - x0)**2 + (T.y - y0)**2)
 
-		for(var/turf/T in trange(max_range, epicenter))
-			var/dist = sqrt((T.x - x0)**2 + (T.y - y0)**2)
+				if(dist < devastation_range)		dist = 1
+				else if(dist < heavy_impact_range)	dist = 2
+				else if(dist < light_impact_range)	dist = 3
+				else								continue
 
-			if(dist < devastation_range)		dist = 1
-			else if(dist < heavy_impact_range)	dist = 2
-			else if(dist < light_impact_range)	dist = 3
-			else								continue
-
-			T.ex_act(dist)
-			if(T)
+				if(!T)
+					T = locate(x0,y0,z0)
 				for(var/atom_movable in T.contents)	//bypass type checking since only atom/movable can be contained by turfs anyway
 					var/atom/movable/AM = atom_movable
 					if(AM && AM.simulated)	AM.ex_act(dist)
 
+				T.ex_act(dist)
+
 		var/took = (world.timeofday-start)/10
 		//You need to press the DebugGame verb to see these now....they were getting annoying and we've collected a fair bit of data. Just -test- changes  to explosion code using this please so we can compare
-		if(Debug2)	world.log << "## DEBUG: Explosion([x0],[y0],[z0])(d[devastation_range],h[heavy_impact_range],l[light_impact_range]): Took [took] seconds."
+		if(Debug2) world.log << "## DEBUG: Explosion([x0],[y0],[z0])(d[devastation_range],h[heavy_impact_range],l[light_impact_range]): Took [took] seconds."
 
 		//Machines which report explosions.
 		for(var/i,i<=doppler_arrays.len,i++)
 			var/obj/machinery/doppler_array/Array = doppler_arrays[i]
 			if(Array)
 				Array.sense_explosion(x0,y0,z0,devastation_range,heavy_impact_range,light_impact_range,took)
-
 		sleep(8)
 
 		if(!powernet_rebuild_was_deferred_already && defer_powernet_rebuild)
 			makepowernets()
 			defer_powernet_rebuild = 0
-
 	return 1
 
-
-
 proc/secondaryexplosion(turf/epicenter, range)
 	for(var/turf/tile in range(range, epicenter))
 		tile.ex_act(2)
diff --git a/code/game/turfs/simulated/wall_attacks.dm b/code/game/turfs/simulated/wall_attacks.dm
index 47620d030a..098782ebdf 100644
--- a/code/game/turfs/simulated/wall_attacks.dm
+++ b/code/game/turfs/simulated/wall_attacks.dm
@@ -1,3 +1,6 @@
+#define ZONE_BLOCKED 2
+#define AIR_BLOCKED 1
+
 //Interactions
 /turf/simulated/wall/proc/toggle_open(var/mob/user)
 
@@ -8,7 +11,9 @@
 		can_open = WALL_OPENING
 		//flick("[material.icon_base]fwall_opening", src)
 		density = 0
+		blocks_air = ZONE_BLOCKED
 		update_icon()
+		update_air()
 		set_light(0)
 		src.blocks_air = 0
 		set_opacity(0)
@@ -18,7 +23,9 @@
 		can_open = WALL_OPENING
 		//flick("[material.icon_base]fwall_closing", src)
 		density = 1
+		blocks_air = AIR_BLOCKED
 		update_icon()
+		update_air()
 		set_light(1)
 		src.blocks_air = 1
 		set_opacity(1)
@@ -28,6 +35,25 @@
 	can_open = WALL_CAN_OPEN
 	update_icon()
 
+#undef ZONE_BLOCKED
+#undef AIR_BLOCKED
+
+/turf/simulated/wall/proc/update_air()
+	if(!air_master)
+		return
+
+	for(var/turf/simulated/turf in loc)
+		update_thermal(turf)
+		air_master.mark_for_update(turf)
+
+
+/turf/simulated/wall/proc/update_thermal(var/turf/simulated/source)
+	if(istype(source))
+		if(density && opacity)
+			source.thermal_conductivity = WALL_HEAT_TRANSFER_COEFFICIENT
+		else
+			source.thermal_conductivity = initial(source.thermal_conductivity)
+
 /turf/simulated/wall/proc/fail_smash(var/mob/user)
 	user << "<span class='danger'>You smash against the wall!</span>"
 	take_damage(rand(25,75))
diff --git a/code/global.dm b/code/global.dm
index 6970e68dff..ea27e3f823 100644
--- a/code/global.dm
+++ b/code/global.dm
@@ -89,7 +89,9 @@ var/list/blobstart          = list()
 var/list/ninjastart         = list()
 
 var/list/cardinal    = list(NORTH, SOUTH, EAST, WEST)
+var/list/cardinalz   = list(NORTH, SOUTH, EAST, WEST, UP, DOWN)
 var/list/cornerdirs  = list(NORTHEAST, NORTHWEST, SOUTHEAST, SOUTHWEST)
+var/list/cornerdirsz = list(NORTHEAST, NORTHWEST, SOUTHEAST, SOUTHWEST, NORTH|UP, EAST|UP, WEST|UP, SOUTH|UP, NORTH|DOWN, EAST|DOWN, WEST|DOWN, SOUTH|DOWN)
 var/list/alldirs     = list(NORTH, SOUTH, EAST, WEST, NORTHEAST, NORTHWEST, SOUTHEAST, SOUTHWEST)
 var/list/reverse_dir = list( // reverse_dir[dir] = reverse of dir
 	 2,  1,  3,  8, 10,  9, 11,  4,  6,  5,  7, 12, 14, 13, 15, 32, 34, 33, 35, 40, 42,
diff --git a/config/example/config.txt b/config/example/config.txt
index 8437829fd3..232d3c66ad 100644
--- a/config/example/config.txt
+++ b/config/example/config.txt
@@ -33,6 +33,9 @@ JOBS_HAVE_MINIMAL_ACCESS
 ## Unhash this to use recursive explosions, keep it hashed to use circle explosions. Recursive explosions react to walls, airlocks and blast doors, making them look a lot cooler than the boring old circular explosions. They require more CPU and are (as of january 2013) experimental
 #USE_RECURSIVE_EXPLOSIONS
 
+Configure how fast explosion strength diminishes when travelling up/down z levels. All explosion distances are multiplied by this each time they go up/down z-levels.
+#MULTI_Z_EXPLOSION_SCALAR 0.5
+
 ## log OOC channel
 LOG_OOC
 
diff --git a/html/changelogs/Anewbe - MultiZAS.yml b/html/changelogs/Anewbe - MultiZAS.yml
new file mode 100644
index 0000000000..c04097eb3d
--- /dev/null
+++ b/html/changelogs/Anewbe - MultiZAS.yml	
@@ -0,0 +1,36 @@
+################################
+# Example Changelog File
+#
+# Note: This file, and files beginning with ".", and files that don't end in ".yml" will not be read. If you change this file, you will look really dumb.
+#
+# Your changelog will be merged with a master changelog. (New stuff added only, and only on the date entry for the day it was merged.)
+# When it is, any changes listed below will disappear.
+#
+# Valid Prefixes: 
+#   bugfix
+#   wip (For works in progress)
+#   tweak
+#   soundadd
+#   sounddel
+#   rscadd (general adding of nice things)
+#   rscdel (general deleting of nice things)
+#   imageadd
+#   imagedel
+#   maptweak
+#   spellcheck (typo fixes)
+#   experiment
+#################################
+
+# Your name.  
+author: Anewbe
+
+# Optional: Remove this file after generating master changelog.  Useful for PR changelogs that won't get used again.
+delete-after: True
+
+# Any changes you've made.  See valid prefix list above.
+# INDENT WITH TWO SPACES.  NOT TABS.  SPACES.
+# SCREW THIS UP AND IT WON'T WORK.
+# Also, all entries are changed into a single [] after a master changelog generation. Just remove the brackets when you add new entries.
+# Please surround your changes in  double quotes ("), as certain characters otherwise screws up compiling. The quotes will not show up in the changelog.
+changes: 
+  - rscadd: "Ports but does not enable Bay's MultiZAS."
\ No newline at end of file
diff --git a/html/changelogs/Leshana - MultiZAS.yml b/html/changelogs/Leshana - MultiZAS.yml
new file mode 100644
index 0000000000..891bf846c2
--- /dev/null
+++ b/html/changelogs/Leshana - MultiZAS.yml	
@@ -0,0 +1,5 @@
+author: Leshana
+delete-after: True
+changes: 
+  - tweak: "Optimized (but still not enabled) multi-z ZAS"
+  - rscadd: "Multi-Z explosion transfer coefficient is now configurable"
\ No newline at end of file