Narset, Jeskai Waymaster

At the beginning of your end step, you may discard your hand. If you do, draw cards equal to the number of spells you've cast this turn.

Gitaxian Probe

({U/P} can be paid with either {U} or 2 life.)
Look at target player's hand.
Draw a card.

Search your library for a card, put that card into your hand, discard a card at random, then shuffle.

If you would draw a card while your library has no cards in it, you win the game instead.

Return target creature to its owner's hand. Untap up to two lands.