Rules FAQ:
- If you win by 0 STR, you can use Pyat Pree's ability to shuffle your deck (it's enough to cause a change of game state).
Warlock.
Reaction: After you win a challenge in which Pyat Pree is participating, search the top X cards of your deck for a attachment or event, reveal it, and add it to your hand. Shuffle your deck. X is the STR by which you won the challenge.
Link: Decklists
Rules FAQ: