Altar of Dementia + Gwenna, Eyes of Gaea Combos

4 known combos featuring both cards in Commander

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

Combo 1 with Thornbite Staff + Bloodsoaked Champion

Results: Infinite death triggers · Infinite ETB · Infinite LTB · Infinite mill · Infinite sacrifice triggers · Infinite self-mill
Steps
  1. Activate Altar of Dementia by sacrificing Bloodsoaked Champion.
  2. Bloodsoaked Champion dies, triggering Gwenna, untapping Gwenna.
  3. Resolve the Altar of Dementia ability, causing target player to mill cards equal to Bloodsoaked Champion's power.
  4. Activate Gwenna by tapping it, adding {1}{B} that can only be spent to cast creature spells or activate abilities of creatures.
  5. Activate Bloodsoaked Champion by paying {1}{B}, returning it from your graveyard to the battlefield.
  6. Repeat.

Combo 2 with Dargo, the Shipwrecker

Results: Infinite +1/+1 counters on a creature · Infinite colored mana that can only be spent to activate abilities of creatures · Infinite colored mana that can only be spent to cast creature spells · Infinite commander casts · Infinite death triggers · Infinite ETB · Infinite LTB · Infinite magecraft triggers · Infinite mill · Infinite sacrifice triggers · Infinite self-mill · Infinite storm count
Show steps
  1. Activate Gwenna by tapping it, adding {1}{R} that can only be spent to cast creature spells or to activate abilities of creatures.
  2. Cast Dargo from the command zone by paying {R}.
  3. Gwenna triggers, putting a +1/+1 counter on it and untapping itself.
  4. Activate Altar of Dementia by sacrificing Dargo.
  5. Choose to return Dargo to the command zone from your graveyard.
  6. Resolve the Altar of Dementia ability, causing target player to mill cards equal to Dargo's power.
  7. Repeat.

Combo 3 with Ebondeath, Dracolich + Nyxbloom Ancient

Results: Infinite +1/+1 counters on a creature · Infinite colored mana that can only be spent to activate abilities of creatures · Infinite colored mana that can only be spent to cast creature spells · Infinite death 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 Ebondeath, causing target player to mill cards equal to Ebondeath's power.
  2. Activate Gwenna by tapping it, adding {4}{B}{B} that can only be spent to cast creature spells or activate abilities of creatures.
  3. Cast Ebondeath from your graveyard by paying {2}{B}{B}.
  4. Gwenna triggers, putting a +1/+1 counter on it and untapping it.
  5. Repeat.

Combo 4 with Ebondeath, Dracolich + Mana Reflection

Results: Infinite +1/+1 counters on a creature · Infinite death 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 Ebondeath, causing target player to mill cards equal to Ebondeath's power.
  2. Activate Gwenna by tapping it, adding {2}{B}{B} that can only be spent to cast creature spells or activate abilities of creatures.
  3. Cast Ebondeath from your graveyard by paying {2}{B}{B}.
  4. Gwenna triggers, putting a +1/+1 counter on it and untapping it.
  5. Repeat.
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