Port over Lavaland mobs and turfs (not finished)

code/game/objects/effects/alien_acid.dm

@@ -53,7 +53,7 @@
 
 		if(istype(target, /turf/simulated/mineral))
 			var/turf/simulated/mineral/M = target
-			M.ChangeTurf(/turf/simulated/floor/plating/airless/asteroid)
+			M.ChangeTurf(/turf/simulated/floor/plating/asteroid/airless)
 
 		if(istype(target, /turf/simulated/floor))
 			var/turf/simulated/floor/F = target

code/game/objects/items/stacks/sheets/mineral.dm

@@ -108,6 +108,11 @@ var/global/list/datum/stack_recipe/adamantine_recipes = list(
 	new /datum/stack_recipe("incomplete servant golem shell", /obj/item/golem_shell/servant, req_amount = 1, res_amount = 1), \
 	)
 
+var/global/list/datum/stack_recipe/snow_recipes = list(
+	new/datum/stack_recipe("snowman", /obj/structure/snowman, 5, one_per_turf = 1, on_floor = 1), \
+	new/datum/stack_recipe("Snowball", /obj/item/snowball, 1)
+	)
+
 /obj/item/stack/sheet/mineral
 	force = 5
 	throwforce = 5
@@ -320,3 +325,19 @@ var/global/list/datum/stack_recipe/plastitanium_recipes = list (
 /obj/item/stack/sheet/mineral/adamantine/New(loc, amount = null)
 	recipes = adamantine_recipes
 	..()
+
+/*
+ * Snow
+ */
+/obj/item/stack/sheet/mineral/snow
+	name = "snow"
+	icon_state = "sheet-snow"
+	item_state = "sheet-snow"
+	singular_name = "snow block"
+	force = 1
+	throwforce = 2
+	merge_type = /obj/item/stack/sheet/mineral/snow
+
+/obj/item/stack/sheet/mineral/snow/New(loc, amount = null)
+	recipes = snow_recipes
+	..()

code/game/objects/structures/mineral_doors.dm

@@ -133,7 +133,7 @@
 	if(istype(W, /obj/item/pickaxe))
 		var/obj/item/pickaxe/digTool = W
 		to_chat(user, "<span class='notice'>You start digging \the [src].</span>")
-		if(do_after(user, digTool.digspeed * hardness, target = src) && src)
+		if(do_after(user, 40 * digTool.toolspeed * hardness, target = src) && src)
 			to_chat(user, "<span class='notice'>You finished digging.</span>")
 			deconstruct(TRUE)
 	else if(user.a_intent != INTENT_HARM)