Marvin, Murderous Mimic + Phyrexian Devourer + Deathbringer Thoctar

Marvin, Murderous Mimic
Phyrexian Devourer
Deathbringer Thoctar

Requires
Marvin, Murderous Mimic must be on the battlefield. Phyrexian Devourer must be on the battlefield. Deathbringer Thoctar must be on the battlefield.
Steps
  1. Activate Marvin using Phyrexian Devourer's ability by exiling the top card of your library, putting a number of +1/+1 counters on Marvin equal to the exiled card's mana value.
  2. Repeat step 1 as desired or until you have an empty library.
  3. Activate Marvin using Deathbringer Thoctar's ability by removing a +1/+1 counter from Marvin, dealing 1 damage to any target.
  4. Repeat step 3 as desired.
Results
Near-infinite damage. Exile your library. Near-infinite +1/+1 counters on Marvin.

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Instants
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