Altar of Dementia + Hofri Ghostforge Combos

2 known combos featuring both cards in Commander

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

Combo 1 with Mistmoon Griffin

Also requires: Mistmoon Griffin Mistmoon Griffin
Results: Infinite death triggers · Infinite ETB · Infinite LTB · Infinite mill · Infinite sacrifice triggers · Infinite self-mill
Steps
  1. Activate Altar of Dementia by sacrificing Mistmoon Griffin.
  2. Mistmoon Griffin dies, triggering itself and Hofri Ghostforge.
  3. Resolve the Hofri Ghostforge trigger, exiling Mistmoon Griffin from your graveyard and creating a token copy of Mistmoon Griffin that has "When this creature leaves the battlefield, return the exiled card to your graveyard".
  4. Resolve the Mistmoon Griffin trigger, returning nothing from your graveyard to the battlefield.
  5. Resolve the Altar of Dementia ability from step 1, causing target player to mill cards equal to Mistmoon Griffin's power.
  6. Activate Altar of Dementia by sacrificing the Mistmoon Griffin token.
  7. The Mistmoon Griffin token dies, triggering itself twice.
  8. Resolve the Mistmoon Griffin token's trigger granted by Hofri Ghostforge, returning Mistmoon Griffin from exile to your graveyard.
  9. Resolve the other Mistmoon Griffin trigger, returning Mistmoon Griffin from your graveyard to the battlefield.
  10. Resolve the Altar of Dementia ability from step 6, causing target player to mill cards equal to Mistmoon Griffin's power.
  11. Repeat.

Combo 2 with Moorland Rescuer

Also requires: Moorland Rescuer Moorland Rescuer
Results: Infinite death triggers · Infinite ETB · Infinite LTB · Infinite mill · Infinite sacrifice triggers · Infinite self-mill
Show steps
  1. Activate Altar of Dementia by sacrificing Moorland Rescuer.
  2. Moorland Rescuer dies, triggering itself and Hofri Ghostforge.
  3. Resolve the Hofri Ghostforge trigger, exiling Moorland Rescuer from your graveyard and creating a token copy of Moorland Rescuer that has "When this creature leaves the battlefield, return the exiled card to your graveyard".
  4. Resolve the Moorland Rescuer trigger, returning nothing from your graveyard to the battlefield.
  5. Resolve the Altar of Dementia ability from step 1, causing target player to mill cards equal to Moorland Rescuer's power.
  6. Activate Altar of Dementia by sacrificing the Moorland Rescuer token.
  7. The Moorland Rescuer token dies, triggering itself twice.
  8. Resolve the Moorland Rescuer token's trigger granted by Hofri Ghostforge, returning Moorland Rescuer from exile to your graveyard.
  9. Resolve the other Moorland Rescuer trigger, returning Moorland Rescuer from your graveyard to the battlefield.
  10. Resolve the Altar of Dementia ability from step 6, causing target player to mill cards equal to Moorland Rescuer's power.
  11. Repeat.
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