Against all odds.

Prerequisites: Character level 6, Any luck feat

Benefit: Once after a d20 check is rolled, you can activate this feat as a free action. You can do so, even if it is not your turn and even if you character is unconscious or dead. If you do so, you can change the roll to a natural one or a natural twenty. If you do so, for the rest of the session, no other character can use this feat. Your character can never ever use this feat again.