The Seer
Identity — Assassin (U)
Unveil {X} (Start the game with this identity face down in the command zone. Turn it face up any time for its unveil cost.)
When The Seer is unveiled, shuffle, then scry X. Reveal the top card of your library and put it into your hand. When you reveal a nonland card this way, The Seer deals damage equal to twice that card’s mana value to any target.