Rey Mysterio, Nimble Pilferer

Whenever Rey Mysterio, Nimble Pilferer deals
combat damage to a player, create a Treasure token
and exile the top card of that player's library.
Until end of turn, you may cast that card.
Dash {1}{r} (You may cast this spell for its dash cost.
If you do, it gains haste, and it's returned from the battlefield to its owner's hand at the beginning of
the next end step.)