From Pathfinder War of Immortals, which isn't enabled.

Correct the Story

FEAT 6

Activity reaction

Trigger An enemy critically succeeds at an attack roll or saving throw.

You know the story of your journey well and can correct it when your enemy tells it incorrectly. Spend a Mythic Point. The enemy must reroll the triggering attack roll or save and take the new result.

Pathfinder War of ImmortalsORC