Trostani's Summoner

Play with the top card of your library revealed. You may cast instant and sorcery spells from the top of your library. Whenever you cast an instant or sorcery spell from your library, copy it. You may choose new targets for the copy.

Counter target spell. Its controller can't cast spells this turn.

Target player mills eight cards. Fuse (You may cast one or both halves of this card from your hand.)

This land enters tapped. T: Add C. 3, T, Return this land to its owner's hand: Search your library for a Gate card, put it onto the battlefield, then shuffle. If you control ten or more Gates with different names, you win the game.

(T: Add W.)