Altar of Dementia + Fecundity Combos

4 known combos featuring both cards in Commander

Infinite draw triggers Near-infinite death triggers Near-infinite ETB Near-infinite LTB Near-infinite mill

Combo 1 with The Locust God

Also requires: The Locust God The Locust God
Results: Infinite card draw · Infinite draw triggers · Near-infinite death triggers · Near-infinite ETB · Near-infinite LTB · Near-infinite mill · Near-infinite sacrifice triggers
Steps
  1. Activate Altar of Dementia by sacrificing a creature.
  2. The creature dies, triggering Fecundity, causing you to draw a card.
  3. The Locust God triggers, creating a 1/1 Insect creature token with flying and haste.
  4. Resolve the Altar of Dementia ability, causing target player to mill cards equal to the sacrificed creature's power.
  5. Repeat.

Combo 2 with Golgari Thug + Aluren

Results: Infinite death triggers · Infinite draw triggers · Infinite ETB · Infinite LTB · Infinite mill · Infinite sacrifice triggers · Infinite self-mill · Infinite storm count
Show steps
  1. Activate Altar of Dementia by sacrificing Golgari Thug.
  2. When Golgari Thug dies, it and Fecundity trigger.
  3. Resolve the Golgari Thug trigger, putting it on top of your library from your graveyard.
  4. Resolve the Fecundity trigger, causing you to draw Golgari Thug from the top of your library.
  5. Resolve the Altar of Dementia ability from step 1, causing target player to mill cards equal to Golgari Thug's power.
  6. Cast Golgari Thug by paying {0} due to Aluren.
  7. Repeat.

Combo 3 with Olivia, Mobilized for War

Results: Near-infinite ETB · Infinite draw triggers · Infinite looting · Near-infinite LTB · Near-infinite mill · Near-infinite death triggers · Near-infinite sacrifice triggers · Infinite self-discard triggers
Show steps
  1. Activate Altar of Dementia by sacrificing the persist creature.
  2. When the persist creature dies, it and Fecundity trigger.
  3. Resolve the Fecundity trigger, causing you to draw a card.
  4. Resolve the persist creature's trigger, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
  5. 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.
  6. Resolve the Altar of Dementia ability.
  7. Repeat.

Combo 4 with Zombie Infestation + Queen Allenal of Ruadach

Results: Infinite self-discard triggers · Near-infinite ETB · Infinite draw triggers · Near-infinite LTB · Near-infinite mill · Infinite rummaging · Near-infinite death triggers · Near-infinite sacrifice triggers · Near-infinite self-mill
Show steps
  1. Activate Zombie Infestation by discarding two cards, creating a 2/2 Zombie creature token and a 1/1 Soldier creature token.
  2. Activate Altar of Dementia twice by sacrificing the Zombie and Soldier.
  3. When the Zombie and Soldier die, Fecundity triggers twice, causing you to draw two cards.
  4. Resolve both Altar of Dementia abilities.
  5. Repeat.
📚 Learn more:
Buy Altar of Dementia on TCGPlayer Buy on Amazon

As an Amazon Associate and TCGPlayer affiliate I earn from qualifying purchases.

Buy Fecundity on TCGPlayer Buy on Amazon

As an Amazon Associate and TCGPlayer affiliate I earn from qualifying purchases.