pf2e.fyi
From Pathfinder Impossible Magic, which isn't enabled.

Devastating Manifestation

FEAT 14
Activity 2 actions
Archetype Soulforger
Prerequisites Soulforger Dedication

Requirements At least one of your soulforged armaments is not manifested.

Your armaments are especially powerful the moment after you manifest them. You Manifest Soulforged Armament. If you manifested a weapon, make up to two Strikes with that weapon, each targeting a different creature and each dealing an additional 1d6 spirit damage. Each attack counts toward your multiple attack penalty, but your penalty doesn't increase until you have made all your attacks. If you Manifested an armor or shield, you gain resistance 5 to all damage until the start of your next turn. If you manifested both a weapon and an armor or shield, you gain both effects.

Pathfinder Impossible MagicORC