Nim Deathmantle + Ashnod's Altar + Great Whale

Nim Deathmantle
Ashnod's Altar
Great Whale

Requires
Nim Deathmantle must be on the battlefield. Ashnod's Altar must be on the battlefield. Great Whale must be on the battlefield. You control up to seven lands that can tap to produce at least 2.
Steps
  1. Activate up to seven lands by tapping them, adding at least 2.
  2. Activate Ashnod's Altar by sacrificing Great Whale, adding .
  3. When Great Whale dies, Nim Deathmantle triggers, returning Great Whale from your graveyard to the battlefield, and attaching Nim Deathmantle to it.
  4. When Great Whale enters the battlefield, it triggers, untapping up to seven lands.
  5. Repeat.
  6. If the lands can tap to produce at least 3, this combo nets infinite mana.
Results
Infinite colorless mana. Infinite death triggers. Infinite ETB. Infinite LTB. Infinite mana lands you control can produce. Infinite sacrifice triggers. Infinite untap of lands you control.

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