diff --git a/code/datums/spells/bloodcrawl.dm b/code/datums/spells/bloodcrawl.dm
index 0034834543f..6307a50f95c 100644
--- a/code/datums/spells/bloodcrawl.dm
+++ b/code/datums/spells/bloodcrawl.dm
@@ -75,7 +75,13 @@
 /obj/effect/dummy/slaughter/singularity_act()
 	return
 
-
+/obj/effect/dummy/slaughter/return_obj_air()
+	var/datum/gas_mixture/GM = new
+	GM.set_oxygen(MOLES_O2STANDARD)
+	GM.set_nitrogen(MOLES_N2STANDARD)
+	GM.set_temperature(T20C)
+	return GM
+		
 /datum/spell/bloodcrawl/proc/block_hands(mob/living/carbon/C)
 	if(C.l_hand || C.r_hand)
 		to_chat(C, "<span class='warning'>You may not hold items while blood crawling!</span>")
diff --git a/code/game/gamemodes/miniantags/demons/demon.dm b/code/game/gamemodes/miniantags/demons/demon.dm
index a012434a263..5c12637d637 100644
--- a/code/game/gamemodes/miniantags/demons/demon.dm
+++ b/code/game/gamemodes/miniantags/demons/demon.dm
@@ -11,7 +11,8 @@
 	stop_automated_movement = TRUE
 	attack_sound = 'sound/misc/demon_attack1.ogg'
 	death_sound = 'sound/misc/demon_dies.ogg'
-	atmos_requirements = list("min_oxy" = 0, "max_oxy" = 0, "min_tox" = 0, "max_tox" = 0, "min_co2" = 0, "max_co2" = 0, "min_n2" = 0, "max_n2" = 0)
+	atmos_requirements = list("min_oxy" = 16, "max_oxy" = 0, "min_tox" = 0, "max_tox" = 0, "min_co2" = 0, "max_co2" = 0, "min_n2" = 0, "max_n2" = 0)
+	unsuitable_atmos_damage = 10
 	minbodytemp = 0
 	maxbodytemp = INFINITY
 	faction = list("demon")
diff --git a/code/game/gamemodes/miniantags/demons/shadow_demon/shadow_demon.dm b/code/game/gamemodes/miniantags/demons/shadow_demon/shadow_demon.dm
index 90d5313d5fb..c68be3da098 100644
--- a/code/game/gamemodes/miniantags/demons/shadow_demon/shadow_demon.dm
+++ b/code/game/gamemodes/miniantags/demons/shadow_demon/shadow_demon.dm
@@ -9,6 +9,7 @@
 	see_in_dark = 10 // Below 10 `see_in_dark`, you'll not have full vision with fullscreen
 	loot = list(/obj/item/organ/internal/heart/demon/shadow)
 	death_sound = 'sound/shadowdemon/shadowdeath.ogg'
+	unsuitable_atmos_damage = 18 // You will heal very slowly in a vacuum (2 damage). Go back to the air to heal faster.
 	var/thrown_alert = FALSE
 	var/wrapping = FALSE
 	/// Should only be TRUE if we're shooting the Shadow Grapple right now. If its TRUE, the demon wont be able to shadow crawl.
diff --git a/code/game/gamemodes/miniantags/pulsedemon/pulsedemon.dm b/code/game/gamemodes/miniantags/pulsedemon/pulsedemon.dm
index 0ff4b65fad7..f83fefaa147 100644
--- a/code/game/gamemodes/miniantags/pulsedemon/pulsedemon.dm
+++ b/code/game/gamemodes/miniantags/pulsedemon/pulsedemon.dm
@@ -28,6 +28,8 @@
 	response_disarm = "pushes their hand through"
 	response_harm = "punches their fist through"
 	deathmessage = "fizzles out into faint sparks, leaving only a slight trail of smoke..."
+	atmos_requirements = list("min_oxy" = 0, "max_oxy" = 0, "min_tox" = 0, "max_tox" = 0, "min_co2" = 0, "max_co2" = 0, "min_n2" = 0, "max_n2" = 0) // "I don't need air, just MORE POWER!"
+	unsuitable_atmos_damage = 0
 	level = 1
 	plane = FLOOR_PLANE
 	layer = ABOVE_PLATING_LAYER