Trazyn the Infinite + Phyrexian Devourer + Walking Ballista

Prerequisites

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Steps

1. 1Activate 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. 2Repeat step 1 as many times as desired, or until your library is empty.
3. 3Activate Trazyn using Walking Ballista's ability by removing a +1/+1 counter from it, dealing 1 damage to any target.
4. 4Repeat step 3 as many times as able/desired.

Effects

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