Sif Animal Expansion 1 (#6038)

* Begins work on the Sivian animal expansion.

* Adds the Leech, Shimm, Duck, Raccoon, Frostfly, Glitterfly, and Kururak.

* Changelog.

* FixFix

* Fix possible slur, fix leech.

* Fixfix2

code/modules/mob/_modifiers/modifiers_misc.dm

@@ -269,6 +269,20 @@ the artifact triggers the rage.
 		return FALSE
 	return TRUE
 
+/datum/modifier/poisoned/paralysis
+	desc = "You have poison inside of you. It will cause harm over a long span of time if not cured, and may cause temporary paralysis."
+	on_created_text = "<span class='warning'>You feel incredibly weak...</span>"
+	damage_per_tick = 0.75
+
+/datum/modifier/poisoned/paralysis/tick()
+	..()
+	if(prob(5))
+		holder.Paralyse(3)
+
+/datum/modifier/poisoned/paralysis/on_applied()
+	..()
+	holder.Paralyse(4)
+
 // Pulse modifier.
 /datum/modifier/false_pulse
 	name = "false pulse"
@@ -278,4 +292,4 @@ the artifact triggers the rage.
 	on_expired_text = "<span class='notice'>You feel.. different.</span>"
 	stacks = MODIFIER_STACK_EXTEND
 
-	pulse_set_level = PULSE_NORM
+	pulse_set_level = PULSE_NORM