Replaces book of babel tendril loot with ominous mirror

code/modules/mining/lavaland/necropolis_chests.dm

@@ -56,7 +56,7 @@ GLOBAL_LIST_EMPTY(aide_list)
 		if(16)
 			new /obj/item/clothing/suit/space/hardsuit/powerarmor_advanced(src)
 		if(17)
-			new /obj/item/book_of_babel(src)
+			new /obj/item/dopmirror(src)
 		if(18)
 			new /obj/item/borg/upgrade/modkit/lifesteal(src)
 			new /obj/item/bedsheet/cult(src)

yogstation.dme

@@ -4367,6 +4367,7 @@
 #include "yogstation\code\modules\mentor\mentorsay.dm"
 #include "yogstation\code\modules\mentor\mentortickets.dm"
 #include "yogstation\code\modules\mining\lavaland\bloodbook.dm"
+#include "yogstation\code\modules\mining\lavaland\doppelmirror.dm"
 #include "yogstation\code\modules\mob\mob.dm"
 #include "yogstation\code\modules\mob\say.dm"
 #include "yogstation\code\modules\mob\dead\new_player\sprite_accessories.dm"

yogstation/code/modules/mining/lavaland/doppelmirror.dm

@@ -0,0 +1,309 @@
+#define COOLDOWN_RECALL 5 SECONDS
+#define COOLDOWN_MIRRORSEARCH 10 SECONDS
+
+/obj/item/dopmirror
+	name = "ominous mirror"
+	desc = "What do you see looking back at you?"
+	icon = 'yogstation/icons/obj/lavaland/artefacts.dmi'
+	icon_state = "mirrornormal"
+	actions_types = list(/datum/action/item_action/mirrorrecall, /datum/action/item_action/rerollmirror)
+	COOLDOWN_DECLARE(next_search)
+	COOLDOWN_DECLARE(next_recall)
+	var/mob/living/carbon/original = null
+	var/mob/living/simple_animal/hostile/double/reflected = null
+
+/obj/item/dopmirror/pickup(mob/user)
+	..()
+	original = user
+
+/obj/item/dopmirror/attack_self(mob/living/user)
+	if(reflected)
+		return
+	if(!(GLOB.ghost_role_flags & GHOSTROLE_STATION_SENTIENCE))
+		to_chat(user, span_notice("Anomalous otherworldly energies keep the mirror from reflecting anything!"))
+		return
+	if(!COOLDOWN_FINISHED(src, next_search))
+		return
+	COOLDOWN_START(src, next_search, COOLDOWN_MIRRORSEARCH)
+
+	to_chat(user, "You peer into the mirror...")
+	var/list/mob/dead/observer/candidates = pollGhostCandidates("Do you want to play as the living reflection in service of [user.real_name]?", ROLE_PAI, null, FALSE, 100, POLL_IGNORE_POSSESSED_BLADE)
+	if(LAZYLEN(candidates))
+		var/mob/dead/observer/C = pick(candidates)
+		var/mob/living/simple_animal/hostile/double/S = new(src)
+		reflected = S
+		S.ckey = C.ckey
+		S.fully_replace_character_name(null, "living reflection")
+		S.copy_languages(user, LANGUAGE_MASTER)	
+		S.update_atom_languages()
+		S.mirror = src
+		S.faction = user.faction
+		to_chat(S, span_warning("<b>As a resident of the mirror, your topmost priority is the safety of your home.</b>"))
+		to_chat(S, span_warning("<b>Physically defending the mirror without a host is impossible. Ensure the mirror is always in someone's hands so you can act.</b>"))
+		to_chat(S, span_warning("<b>You are moderately strong and are able to deal stronger blows to typical lavaland fauna.</b>"))
+		to_chat(S, span_warning("<b>You are fragile but cannot truly be destroyed until the mirror is. You are able to recover inside the mirror, and excessive damage will seal\
+		 you inside of it for 20 seconds.</b>"))
+		to_chat(S, span_warning("<b>Additionally, you possess the ability to swap places with the current host while outside the mirror.</b>"))
+		grant_all_languages(FALSE, FALSE, TRUE)
+		to_chat(user, "... and you see your reflection trying to leave!")
+		playsound(src, 'sound/effects/glassbr2.ogg', 75)
+		src.update_icon()
+	else
+		to_chat(user, "... and your reflection stares back at you. Try again later.")
+
+/obj/item/dopmirror/Destroy()
+	to_chat(reflected, span_userdanger("Your world shatters."))
+	qdel(reflected)
+	return ..()
+
+/obj/item/dopmirror/ui_action_click(mob/living/user, action)
+	if(istype(action, /datum/action/item_action/mirrorrecall))
+		if(!COOLDOWN_FINISHED(src, next_recall))
+			to_chat(user, span_warning("You can't do that yet!"))
+			return
+		if(!reflected)
+			to_chat(user, span_notice("You don't have anything to call back!"))
+			return
+		playsound(src, 'sound/effects/glassknock.ogg', 75)
+		to_chat(user, span_notice("You knock on the mirror and call your reflection back into focus."))
+		reflected.forceMove(src)
+		update_icon(inhabited = TRUE)
+		COOLDOWN_START(src, next_search, COOLDOWN_RECALL)
+	if(istype(action, /datum/action/item_action/rerollmirror))
+		if(!reflected)
+			to_chat(user, span_notice("The mirror is dormant."))
+			return
+		if(tgui_alert(user, "Are you sure? This will likely replace the current reflection with someone else!",,list("Yes","No")) != "Yes")
+			return
+		to_chat(user, span_notice("You shake the mirror violently."))
+		var/list/mob/dead/observer/candidates = pollGhostCandidates("Do you want to play as the living reflection in service of [user.real_name]?", ROLE_PAI, null, FALSE, 100, POLL_IGNORE_POSSESSED_BLADE)
+		if (!LAZYLEN(candidates))
+			to_chat(src, span_notice("There were no other residents willing to work with you. Looks like you're stuck with this one for now."))
+			return
+		var/mob/dead/observer/C = pick(candidates)
+		to_chat(reflected, span_notice("Your host shook you off, and you were replaced by one of your neighbors. Looks like they weren't happy with your performance."))
+		to_chat(user, span_notice(span_bold("The reflection in the mirror looks back at you differently now.")))
+		log_game("[key_name(user)] has reset their reflection, it is now [key_name(reflected)] (initiated by [user])")
+		reflected.key = C.key
+
+/obj/item/dopmirror/update_icon(inhabited = FALSE)
+	. = ..()
+	if(inhabited == TRUE)
+		icon_state = "mirrornormal"
+		return
+	icon_state = "mirrorcrack"
+	return
+
+
+/obj/item/dopmirror/dropped(mob/user, silent)
+	. = ..()
+	if(src in user)
+		return
+	original = null
+
+
+/datum/action/item_action/mirrorrecall
+	name = "Recall"
+	desc = "Bring the reflection back into the mirror."
+	button_icon = 'yogstation/icons/obj/lavaland/artefacts.dmi'
+	button_icon_state = "mirrornormal"
+
+/datum/action/item_action/rerollmirror
+	name = "Shake Mirror"
+	desc = "Attempt to have a different mirror resident replace the current one."
+	button_icon = 'icons/mob/actions/actions_spells.dmi'
+	button_icon_state = "mindswap"
+
+//doppelganger code
+
+/mob/living/simple_animal/hostile/double
+	name = "living reflection"
+	real_name = "living reflection"
+	desc = "A bound spirit."
+	gender = PLURAL
+	icon = 'icons/mob/mob.dmi'
+	icon_state = "shade"
+	icon_living = "shade"
+	mob_biotypes = list(MOB_SPIRIT)
+	maxHealth = 20
+	health = 20
+	speed = -1
+	density = FALSE
+	projectiletype = /obj/projectile/doppshot
+	projectilesound = 'sound/weapons/pierce.ogg'
+	ranged = TRUE
+	ranged_message = "fires at"
+	ranged_cooldown_time = 25
+	see_in_dark = 8
+	spacewalk = TRUE
+	speak_emote = list("echoes")
+	melee_damage_lower = 14
+	melee_damage_upper = 14
+	obj_damage = 10
+	attacktext = "metaphysically strikes"
+	minbodytemp = 0
+	maxbodytemp = INFINITY
+	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)
+	movement_type = FLYING
+	var/obj/item/dopmirror/mirror = null// the mirror that's returned to on dying
+	var/melee_fauna_bonus = 36
+	var/hibernating = FALSE
+	var/move_range = 20
+	var/datum/action/innate/jumpback/jumpback
+	var/datum/action/innate/appear/appear
+	var/datum/action/innate/swap/swap
+
+/mob/living/simple_animal/hostile/double/Initialize()
+	. = ..()
+	jumpback = new
+	jumpback.Grant(src)
+	appear = new
+	appear.Grant(src)
+	swap = new
+	swap.Grant(src)
+
+/mob/living/simple_animal/hostile/double/Bump(atom/A)
+	. = ..()
+	if(ismineralturf(A))
+		var/turf/closed/mineral/M = A
+		M.attempt_drill()
+
+/mob/living/simple_animal/hostile/double/start_pulling(atom/movable/AM, state, force, supress_message)
+	if(isliving(AM))
+		return
+	. = ..()
+
+/mob/living/simple_animal/hostile/double/death()
+	playsound(src, 'sound/effects/glassbr3.ogg', 75)
+	src.forceMove(mirror)
+	hibernating = TRUE
+	appearance = mirror.original.appearance
+	for(jumpback in src.actions)
+		jumpback.Activate()
+	for(var/datum/action/innate/appear/appear in src.actions)
+		appear.Activate(died = TRUE)
+	return FALSE // want the way to kill it being linked directly to the mirror
+
+
+/mob/living/simple_animal/hostile/double/Life()
+	if(hibernating == TRUE)
+		src.heal_bodypart_damage(3)
+
+/mob/living/simple_animal/hostile/double/Move(NewLoc, Dir = 0)
+	. = ..()
+	if(hibernating == TRUE)
+		hibernating = FALSE
+	if(get_dist(src,mirror) > move_range)
+		to_chat(src, span_notice("You can't move that far from the mirror and are called back!"))
+		for(jumpback in src.actions)
+			jumpback.Activate()
+
+/mob/living/simple_animal/hostile/double/AttackingTarget()
+	..()
+	var/mob/living/simple_animal/M = target
+	if(ismegafauna(M) || istype(M, /mob/living/simple_animal/hostile/asteroid) || istype(M, /mob/living/simple_animal/hostile/yog_jungle))
+		M.apply_damage(melee_fauna_bonus, BRUTE)
+
+/mob/living/simple_animal/hostile/double/bullet_act(obj/projectile/P)
+	src.adjustBruteLoss(0.25* P.damage)
+	return BULLET_ACT_FORCE_PIERCE	
+
+
+/mob/living/simple_animal/hostile/double/dust(just_ash, drop_items, force)
+	death()
+
+/mob/living/simple_animal/hostile/double/gib()
+	death()
+
+//reflection's abilities
+
+/datum/action/innate/jumpback
+	name = "Return to Mirror"
+	button_icon = 'yogstation/icons/obj/lavaland/artefacts.dmi'
+	button_icon_state = "mirrornormal"
+
+/datum/action/innate/jumpback/Activate()
+	var/mob/living/simple_animal/hostile/double/doppelganger = owner
+	doppelganger.forceMove(doppelganger.mirror)
+	doppelganger.hibernating = TRUE
+	doppelganger.mirror.update_icon(inhabited = TRUE)
+	doppelganger.appearance = doppelganger.mirror.original.appearance
+	doppelganger.alpha = 130
+	playsound(doppelganger, 'sound/effects/glassknock.ogg', 75)
+
+
+#define COOLDOWN_REAPPEAR 20 SECONDS
+/datum/action/innate/appear
+	name = "Exit Mirror"
+	button_icon = 'yogstation/icons/obj/lavaland/artefacts.dmi'
+	button_icon_state = "mirrorcrack"
+	COOLDOWN_DECLARE(next_appearance)
+
+/datum/action/innate/appear/Activate(died = FALSE)
+	var/mob/living/simple_animal/hostile/double/doppelganger = owner
+	var/turf/M = get_turf(doppelganger.mirror)
+	if(!COOLDOWN_FINISHED(src, next_appearance))
+		to_chat(doppelganger, span_warning("You can't leave the mirror yet!"))
+		return
+	if(doppelganger.mirror.original == null) 
+		if(!(doppelganger.hibernating))
+			return
+		if(doppelganger.mirror.original.stat != CONSCIOUS)
+			to_chat(doppelganger, span_warning("You wouldn't be able to do anything as they are now!"))
+			return
+		to_chat(doppelganger, span_warning("You can't leave the mirror without a host to copy!"))
+		return
+	doppelganger.hibernating = FALSE	
+	doppelganger.mirror.update_icon()
+	if(died == TRUE)
+		COOLDOWN_START(src, next_appearance, COOLDOWN_REAPPEAR)
+		return
+	doppelganger.forceMove(M)
+	doppelganger.appearance = doppelganger.mirror.original.appearance
+	doppelganger.alpha = 130
+
+
+#define COOLDOWN_SPOTSWAP 15 SECONDS
+/datum/action/innate/swap
+	name = "Swap"
+	button_icon = 'icons/mob/actions/actions_minor_antag.dmi'
+	button_icon_state = "separate"
+	COOLDOWN_DECLARE(next_swap)
+
+/datum/action/innate/swap/Activate(died = FALSE)
+	var/mob/living/simple_animal/hostile/double/doppelganger = owner
+	var/turf/going = get_turf(doppelganger.mirror)
+	var/turf/doppspot = get_turf(doppelganger)
+	if(!COOLDOWN_FINISHED(src, next_swap))
+		to_chat(doppelganger, span_warning("You can't exchange locations yet!"))
+		return
+	if(!isturf(doppelganger.loc)) //so it's not used from inside the mirror 
+		return
+	if(istype(doppspot, /turf/open/chasm)) 
+		to_chat(doppelganger, span_warning("You probably shouldn't risk the mirror falling from such a height."))
+		return
+	if(istype(doppspot, /turf/open/lava)) 
+		to_chat(doppelganger, span_warning("You probably shouldn't risk the mirror falling into lava."))
+		return
+	COOLDOWN_START(src, next_swap, COOLDOWN_SPOTSWAP)
+	doppelganger.forceMove(going)
+	doppelganger.mirror.original.forceMove(doppspot)
+	playsound(going, 'sound/effects/bamf.ogg', 50)
+	playsound(doppspot, 'sound/effects/bamf.ogg', 50)
+	to_chat(doppelganger, span_warning("You exchange places with the mirror's holder!"))
+
+
+/obj/projectile/doppshot
+	name = "mirrored shot"
+	icon_state = "greyscale_bolt"
+	nodamage = TRUE //for the sake of welding tanks
+	damage_type = BRUTE
+	damage = 0
+	var/actual_damage = 5
+	var/ranged_fauna_bonus = 15
+
+/obj/projectile/doppshot/on_hit(atom/target, blocked = FALSE)
+	var/mob/living/M = target
+	M.apply_damage(actual_damage, BRUTE)
+	if(ismegafauna(M) || istype(M, /mob/living/simple_animal/hostile/asteroid) || istype(M, /mob/living/simple_animal/hostile/yog_jungle))
+		M.apply_damage(ranged_fauna_bonus, BRUTE)