Impossible Proof

Present a chain of logic, calculation, or evidence to one creature that can understand you. The target must make an INT save or be unable to knowingly state a falsehood, deny the proven conclusion, or take an action that directly contradicts the proof for the duration. Hostile creatures repeat the save at the end of each turn.

This power has its own stable page so it can be linked from any character, item, location, story post, bargain, curse, or future reward.