Casey Jones, Back Alley Brute + Phyrexian Devourer

R identity

Commander legal

The 2 combo pieces

• Casey Jones, Back Alley Brute
• Phyrexian Devourer

How to execute it

1. Activate Phyrexian Devourer by exiling the top card of your library, putting a number of +1/+1 counters on it equal to the exiled card's mana value.
2. Casey's second ability triggers, and Phyrexian Devourer triggers if it's power is 7 or greater.
3. Resolve the Casey trigger, dealing damage to an opponent.
4. Holding priority, repeat from step 1 until your library.
5. Resolve all Phyrexian Devourer triggers, sacrificing it.

What the combo produces

• Exile your library
• Near-infinite damage