pf2e.fyi
From Pathfinder Lost Omens Impossible Lands, which isn't enabled.

Untwisting Iron Augmentation

FOCUS 7
UNCOMMONCONCENTRATEEARTHFOCUS
Cast
Duration 1 minute

Your unarmed attacks are treated as cold iron and silver, they gain the earth trait, and they gain a +1 status bonus to damage rolls per damage die.

Spell Effect: Untwisting Iron Augmentation

Heightened (9th) Your unarmed attacks are also treated as adamantine.
Pathfinder Lost Omens Impossible LandsOGL