Dewey, Rhystic Librarian

Hexproof
{t}You win the game
Dewey, Rhystic Librarian enters the battlefield tapped and does not untap during the untap step. If a spell, effect, or ability would untap Dewey, Rhystic Librarian, destroy Dewey, Rhystic Librarian and put a 3/3 colorless troll token onto the battlefield.
"Wait...I can still win..."