Port over remaining Lavaland ruins

code/game/dna/dna2.dm

@@ -437,4 +437,18 @@ var/global/list/bad_blocks[0]
 	var/datum/species/S = data["species"]
 	species = new S
 	b_type = data["b_type"]
-	real_name = data["real_name"]
+	real_name = data["real_name"]
+
+/datum/dna/proc/transfer_identity(mob/living/carbon/human/destination)
+	if(!istype(destination))
+		return
+
+	// We manually set the species to ensure all proper species change procs are called.
+	destination.set_species(species.type, retain_damage = TRUE)
+	var/datum/dna/new_dna = Clone()
+	new_dna.species = destination.dna.species
+	destination.dna = new_dna
+	destination.dna.species.handle_dna(destination) // Handle DNA has to be re-called as the DNA was changed.
+
+	destination.UpdateAppearance()
+	domutcheck(destination, null, MUTCHK_FORCED)