Primal Iron

[Evion]

is this even possible in pathfinder, and if yes how would it be coded

Primal iron:
weapons count as cold iron for the purpose of overcoming damage reduction, affecting regeneration , and concerning vulnerability to cold iron . Creatures whose damage reduction is overcome by cold iron , or whose regeneration stops functioning due to a cold iron attack, or who are vulnerable to cold iron take half "again" as much damage (+50%) from a primal iron weapon (additional dice damage is not increased such as that from a burst special ability or sneak attack damage) as normal.

[darrenan]

apply this effect to the actor (player or NPC): "DMGTYPE: cold iron"

for more information about effects in the 3.5/PF ruleset, see https://www.fantasygrounds.com/wiki/...p/3.5E_Effects