Kaz, Breakaway Shard

Ingest (Whenever this creature deals combat damage to a player, that player exiles the top card of their library.)
{x}{c}{c}{c},{t}: You may cast a nonland card with converted mana cost X exiled with Kaz, Breakaway Shard without paying its mana cost.
The Gatewatch were unaware that a tiny piece of the titan kozilek had become detached from its master and thought of them as its new overlords.