Aurora, Rekindled Mind

Whenever you cast a noncreature spell, create a Cannon token. “(T, Sacrifice this artifact: It deals 1 damage to any target. If this is the third Cannon you’ve sacrificed this turn, draw a card.”)
Whenever you sacrifice an artifact, put a battery counter on Aurora.

Remove X battery counters from Aurora: Exile the top X cards of your library. You may play those cards this turn.