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

Advanced Weaponry

FEAT 1

Your eidolon's attack evolves.

Choose one of your eidolon's starting melee unarmed attacks to gain one of the following traits, chosen when you gain the feat: disarm; grapple; nonlethal; shove; trip; or versatile B, P, or S.

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