Shepherd of the Cosmos + Ashnod's Altar + Kaya's Ghostform

Shepherd of the Cosmos
Ashnod's Altar
Kaya's Ghostform

Requires
Shepherd of the Cosmos must be on the battlefield. Ashnod's Altar must be on the battlefield. Kaya's Ghostform must be on the battlefield. Kaya's Ghostform attached to Shepherd of the Cosmos.
Steps
  1. Activate Ashnod's Altar by sacrificing Shepherd of the Cosmos, adding .
  2. When Shepherd of the Cosmos dies, Kaya's Ghostform triggers, returning Shepherd of the Cosmos from your graveyard to the battlefield.
  3. When Shepherd of the Cosmos enters the battlefield, it triggers, returning Kaya's Ghostform from your graveyard to the battlefield attached to Shepherd of the Cosmos.
  4. Repeat.
Results
Infinite LTB. Infinite ETB. Infinite sacrifice triggers. Infinite death triggers. Infinite colorless mana.

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