init

code/modules/antagonists/abductor/equipment/glands/ventcrawl.dm

@@ -9,4 +9,4 @@
 
 /obj/item/organ/heart/gland/ventcrawling/activate()
 	to_chat(owner, "<span class='notice'>You feel very stretchy.</span>")
-	owner.ventcrawler = VENTCRAWLER_ALWAYS
+	owner.AddElement(/datum/element/ventcrawling, duration = mind_control_duration, given_tier = VENTCRAWLER_ALWAYS)

code/modules/antagonists/devil/true_devil/_true_devil.dm

@@ -11,7 +11,6 @@
 	gender = NEUTER
 	health = 350
 	maxHealth = 350
-	ventcrawler = VENTCRAWLER_NONE
 	density = TRUE
 	pass_flags =  0
 	sight = (SEE_TURFS | SEE_OBJS)

code/modules/antagonists/morph/morph.dm

@@ -15,7 +15,6 @@
 	stop_automated_movement = 1
 	status_flags = CANPUSH
 	pass_flags = PASSTABLE
-	ventcrawler = VENTCRAWLER_ALWAYS
 	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)
 	minbodytemp = 0
 	maxHealth = 150
@@ -51,6 +50,10 @@
 							You can attack any item or dead creature to consume it - creatures will fully restore your health. \
 							Finally, you can restore yourself to your original form while morphed by shift-clicking yourself.</b>"
 
+/mob/living/simple_animal/hostile/morph/Initialize()
+	. = ..()
+	src.AddElement(/datum/element/ventcrawling, given_tier = VENTCRAWLER_ALWAYS)
+
 /mob/living/simple_animal/hostile/morph/examine(mob/user)
 	if(morphed)
 		. = form.examine(user)

code/modules/antagonists/swarmer/swarmer.dm

@@ -93,7 +93,6 @@
 	AIStatus = AI_OFF
 	pass_flags = PASSTABLE
 	mob_size = MOB_SIZE_TINY
-	ventcrawler = VENTCRAWLER_ALWAYS
 	ranged = 1
 	projectiletype = /obj/item/projectile/beam/disabler
 	ranged_cooldown_time = 20
@@ -112,6 +111,7 @@
 	remove_verb(src, /mob/living/verb/pulled)
 	for(var/datum/atom_hud/data/diagnostic/diag_hud in GLOB.huds)
 		diag_hud.add_to_hud(src)
+	src.AddElement(/datum/element/ventcrawling, given_tier = VENTCRAWLER_ALWAYS)
 
 /mob/living/simple_animal/hostile/swarmer/med_hud_set_health()
 	var/image/holder = hud_list[DIAG_HUD]