Nim Deathmantle + Ashnod's Altar + Knight of the Last Breath

Nim Deathmantle
Ashnod's Altar
Knight of the Last Breath

Requires
Nim Deathmantle must be on the battlefield. Ashnod's Altar must be on the battlefield. Knight of the Last Breath must be on the battlefield.
Steps
  1. Activate Ashnod's Altar by sacrificing Knight of the Last Breath, adding .
  2. When Knight of the Last Breath dies, its afterlife ability and Nim Deathmantle trigger.
  3. Resolve the Knight of the Last Breath trigger, creating three 1/1 Spirit creature tokens.
  4. Activate Ashnod's Altar by sacrificing a Spirit, adding .
  5. Resolve the Nim Deathmantle trigger from step 2, causing you to pay 4 to return Knight of the Last Breath from your graveyard to the battlefield, and attach Nim Deathmantle to it.
  6. Repeat.
Results
Infinite colorless mana. Infinite creature tokens. Infinite death triggers. Infinite ETB. Infinite LTB. Infinite sacrifice triggers.

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