Ashnod's Altar + Timeless Witness Combos

3 known combos featuring both cards in Commander

Infinite LTB Infinite ETB Infinite sacrifice triggers Infinite death triggers Infinite colorless mana

Combo 1 with Afterlife from the Loam + Pitiless Plunderer

Results: Infinite LTB · Infinite ETB · Infinite colored mana · Infinite sacrifice triggers · Infinite death triggers · Infinite colorless mana · Infinite storm count · Infinite magecraft triggers · Infinite Treasure tokens · Infinite recursion of creature cards in your graveyard
Steps
  1. Cast Afterlife from the Loam by paying at most {5}{B}{B}{B}, returning Timeless Witness and at least two other creatures from graveyards to the battlefield under your control.
  2. When Timeless Witness enters the battlefield, it triggers, returning Afterlife from the Loam from your graveyard to your hand.
  3. Activate Ashnod's Altar four times by sacrificing three of the creatures returned in step 1, adding six {C}.
  4. When the creatures die, Pitiless Plunderer triggers four times, creating three Treasure tokens.
  5. Activate the three Treasures by tapping and sacrificing them, adding {B}{B}{B}.
  6. Repeat.

Combo 2 with Mikaeus, the Unhallowed + Living Death + Blood Pet

Results: Infinite colorless mana · Infinite death triggers · Infinite ETB · Infinite LTB · Infinite magecraft triggers · Infinite sacrifice triggers · Infinite storm count
Show steps
  1. Activate Blood Pet by sacrificing it, adding {B}.
  2. When Blood Pet dies, its undying ability triggers, returning it to the battlefield from your graveyard with a +1/+1 counter on it.
  3. Activate Blood Pet by sacrificing it, adding {B}.
  4. Activate Ashnod's Altar twice by sacrificing Timeless Witness and Mikaeus, adding {C}{C}{C}{C}.
  5. Cast Living Death by paying {3}{B}{B}, causing each player to exile all creature cards in their graveyards, sacrifice all creatures they control, then put all cards exiled this way onto the battlefield.
  6. When Timeless Witness enters the battlefield, it triggers, returning Living Death to your hand from your graveyard.
  7. Repeat.

Combo 3 with Mikaeus, the Unhallowed + Rise of the Dark Realms + Blood Pet

Results: Infinite colorless mana · Infinite death triggers · Infinite ETB · Infinite LTB · Infinite magecraft triggers · Infinite sacrifice triggers · Infinite storm count
Show steps
  1. Activate Blood Pet by sacrificing it, adding {B}.
  2. When Blood Pet dies, its undying ability triggers, returning it to the battlefield from your graveyard with a +1/+1 counter on it.
  3. Activate Blood Pet by sacrificing it, adding {B}.
  4. Activate Ashnod's Altar twice by sacrificing Timeless Witness and another nontoken non-Human creature, adding {C}{C}{C}{C}.
  5. When the non-Human creature dies, its undying ability triggers, returning it to the battlefield from your graveyard with a +1/+1 counter on it.
  6. Activate Ashnod's Altar twice by sacrificing Mikaeus and the non-Human creature, adding {C}{C}{C}{C}.
  7. Cast Rise of the Dark Realms by paying {7}{B}{B}, putting all creature cards from all graveyards onto the battlefield under your control.
  8. When Timeless Witness enters the battlefield, it triggers, returning Living Death to your hand from your graveyard.
  9. Repeat.
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