Hallowed Spiritkeeper + Nim Deathmantle Combos

2 known combos featuring both cards in Commander

Infinite creature tokens Infinite death triggers Infinite ETB Infinite LTB Infinite sacrifice triggers

Combo 1 with Ashnod's Altar

Also requires: Ashnod's Altar Ashnod's Altar
Results: Infinite colorless mana · Infinite creature tokens · Infinite death triggers · Infinite ETB · Infinite LTB · Infinite sacrifice triggers
Steps
  1. Activate Ashnod's Altar by sacrificing Hallowed Spiritkeeper, adding {C}{C}.
  2. When Hallowed Spiritkeeper dies, it and Nim Deathmantle trigger,
  3. Resolve the Hallowed Spiritkeeper trigger, creating at least one creature token.
  4. Holding priority, activate Ashnod's Altar by sacrificing a creature token, adding {C}{C}.
  5. Resolve the Nim Deathmantle trigger, causing you to pay {4} to return Hallowed Spiritkeeper from your graveyard to the battlefield and attach Nim Deathmantle to it.
  6. Repeat.

Combo 2 with Phyrexian Altar

Also requires: Phyrexian Altar Phyrexian Altar
Results: Infinite colored mana · Infinite creature tokens · Infinite death triggers · Infinite ETB · Infinite LTB · Infinite sacrifice triggers
Show steps
  1. Activate Phyrexian Altar by sacrificing Hallowed Spiritkeeper, adding {1}.
  2. Hallowed Spiritkeeper dies, triggering itself and Nim Deathmantle.
  3. Resolve the Hallowed Spiritkeeper trigger, creating at least four 1/1 Spirit creature tokens.
  4. Activate Phyrexian Altar three times by sacrificing three Spirits, adding {3}.
  5. Resolve the Nim Deathmantle trigger from step 2, causing you to pay {4} to return Hallowed Spiritkeeper from your graveyard to the battlefield, and attach Nim Deathmantle to it.
  6. Repeat.
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