Ral Zarek, the Enigma

Whenever you cast a noncreature spell, galvanize. (Create a colorless Beacon artifact token with "{1}, Sacrifice this artifact: It deals 1 damage to any target. Add {e}.")
{e}: Exile the top card of your library. You
may cast that card until end of turn.
{x}{x}{e}{e}: Counter target spell with converted mana cost X.