Casey Jones, Back Alley Brute + Ob Nixilis, Captive Kingpin

Prerequisites

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Steps

1. 1Declare Casey as an attacker, triggering its first ability, putting a +1/+1 counter on it.
2. 2Casey's second ability triggers, dealing 1 damage to an opponent.
3. 3Ob Nixilis triggers, putting a +1/+1 counter on it and exiling the top card of your library with the ability to play it until your end step.
4. 4Repeat from step 2.

Effects

• Exile your library with the ability to play the exiled cards until end of turn
• Infinite +1/+1 counters on a creature
• Infinite damage