Phyrexian Devourer + Trazyn the Infinite + Walking Ballista

B identity

Commander legal

The 3 combo pieces

• Phyrexian Devourer
• Trazyn the Infinite
• Walking Ballista

How to execute it

1. Activate Trazyn using Phyrexian Devourer's ability by exiling the top card of your library, putitng a number of +1/+1 counters on Trazyn equal to the exiled card's mana value.
2. Repeat step 1 as many times as desired, or until your library is empty.
3. Activate Trazyn using Walking Ballista's ability by removing a +1/+1 counter from it, dealing 1 damage to any target.
4. Repeat step 3 as many times as able/desired.

What the combo produces

• Exile your library
• Near-infinite +1/+1 counters on a creature
• Near-infinite damage