Aerith Gainsborough + Altar of Dementia Combos

1 known combo featuring both cards in Commander

Infinite LTB Infinite ETB Infinite sacrifice triggers Infinite death triggers Infinite mill

Combo 1 with Derevi, Empyrial Tactician + Cauldron of Souls

Results: Infinite LTB · Infinite ETB · Infinite sacrifice triggers · Infinite death triggers · Infinite mill · Infinite self-mill · Infinite +1/+1 counters on legendary creatures you control
Steps
  1. Activate Cauldron of Souls by tapping it, giving Derevi and Aerith persist until end of turn.
  2. Activate Altar of Dementia by sacrificing Derevi.
  3. When Derevi dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
  4. When Derevi enters the battlefield, it triggers, untapping Cauldron of Souls.
  5. Activate Altar of Dementia by sacrificing Aerith.
  6. When Aerith dies, it triggers twice.
  7. Resolve Aerith's persist trigger, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
  8. Resolve the second Aerith trigger, putting a +1/+1 counter on each legendary creature you control, thus removing the -1/-1 counters from Aerith and Derevi.
  9. Resolve the Altar of Dementia abilities from steps 2 and 5.
  10. Repeat.
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