Metamorphosis Fanatic + Body Double + Ashnod's Altar

Metamorphosis Fanatic
Body Double
Ashnod's Altar

Requires
Metamorphosis Fanatic must be in hand. Body Double must be in the graveyard. Ashnod's Altar must be on the battlefield.
Steps
  1. Cast Metamorphosis Fanatic by paying 4.
  2. When Metamorphosis Fanatic enters the battlefield, it triggers, targeting Body Double.
  3. Holding priority, activate Ashnod's Altar by sacrificing Metamorphosis Fanatic, adding .
  4. Resolve the Metamorphosis Fanatic ability, returning Body Double from your graveyard to the battlefield as a copy of Metamorphosis Fanatic.
  5. When Body Double enters the battlefield, it triggers, targeting Metamorphosis Fanatic.
  6. Holding priority, activate Ashnod's Altar by sacrificing Body Double, adding .
  7. Resolve the Body Double ability, returning Metamorphosis Fanatic from your graveyard to the battlefield.
  8. Repeat from step 2.
Results
Infinite LTB. Infinite ETB. Infinite sacrifice triggers. Infinite death triggers. Infinite colorless mana.

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Creatures
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Barrowin of Clan Undurr
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