Trixie, Dimensional Scholar

{u}{b}{r}: Exile Trixie Starbright, Dimensional Scholar. At the beginning of your next end step, return her to the battlefield under your control with one shard counter. Shard counters are not lost when Trixie Starbright, Dimensional Scholar leaves the battlefield.
Whenever Trixie Starbright, Dimensional Scholar enters the battlefield, if she has five shard counters on her, you win the game.