Altar of Dementia + Warhost's Frenzy Combos

2 known combos featuring both cards in Commander

Infinite draw triggers Infinite self-discard triggers Near-infinite ETB Near-infinite LTB Near-infinite death triggers

Combo 1 with Olivia, Mobilized for War

Results: Infinite draw triggers · Infinite looting · Infinite self-discard triggers · Near-infinite ETB · Near-infinite LTB · Near-infinite death triggers · Near-infinite mill · Near-infinite sacrifice triggers
Steps
  1. Cast Warhost's Frenzy with kicker by paying {2}{B}{R}.
  2. Activate Altar of Dementia by sacrificing the persist creature.
  3. When the persist creature dies, it and Warhost's Frenzy trigger.
  4. Resolve the Warhost's Frenzy trigger, causing you to draw a card.
  5. Resolve the persist creature's trigger, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
  6. When the persist creature enters the battlefield, Olivia triggers, putting a +1/+1 counter on the persist creature and causing you to discard a card.
  7. Resolve the Altar of Dementia ability.
  8. Repeat from step 2

Combo 2 with Zombie Infestation + Queen Allenal of Ruadach

Results: Infinite draw triggers · Infinite rummaging · Infinite self-discard triggers · Near-infinite ETB · Near-infinite LTB · Near-infinite death triggers · Near-infinite mill · Near-infinite sacrifice triggers · Near-infinite self-mill
Show steps
  1. Cast Warhost's Frenzy with kicker by paying {2}{B}{R}.
  2. Activate Zombie Infestation by discarding two cards, creating a 2/2 Zombie creature token and a 1/1 Soldier creature token.
  3. Activate Altar of Dementia twice by sacrificing the Zombie and Soldier.
  4. When the Zombie and Soldier die, Warhost's Frenzy triggers twice, causing you to draw two cards.
  5. Resolve both Altar of Dementia abilities.
  6. Repeat from step 2
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