Altar of Dementia + Moss-Pit Skeleton Combos

3 known combos featuring both cards in Commander

Infinite death triggers Infinite ETB Infinite LTB Infinite sacrifice triggers Infinite +1/+1 counters on a creature

Combo 1 with The Wise Mothman + Scurry Oak

Results: Infinite +1/+1 counters on a creature · Infinite death triggers · Infinite ETB · Infinite LTB · Infinite sacrifice triggers
Steps
  1. Put a +1/+1 counter on Scurry Oak,
  2. Scurry Oak's second ability and Moss-Pit Skeleton trigger.
  3. Resolve the Scurry Oak trigger, creating a 1/1 Squirrel creature token.
  4. Resolve the Moss-Pit Skeleton trigger, putting it from your graveyard on top of your library.
  5. Activate Altar of Dementia by sacrificing the Squirrel token, causing you to mill Moss-Pit Skeleton from the top of your library.
  6. The Wise Mothman's second ability triggers, putting a +1/+1 counter on Scurry Oak.
  7. Repeat from step 2.

Combo 2 with The Wise Mothman + Herd Baloth

Results: Infinite +1/+1 counters on a creature · Infinite death triggers · Infinite ETB · Infinite LTB · Infinite sacrifice triggers · Infinite self-mill · Near-infinite +1/+1 counters
Show steps
  1. Put a +1/+1 counter on Herd Baloth.
  2. Herd Baloth and Moss-Pit Skeleton trigger.
  3. Resolve the Herd Baloth trigger, creating a 4/4 Beast creature token.
  4. Resolve the Moss-Pit Skeleton trigger, putting it from your graveyard on top of your library.
  5. Activate Altar of Dementia by sacrificing the Beast token, causing you to mill Moss-Pit Skeleton and three other cards from the top of your library.
  6. The Wise Mothman's second ability triggers at least once, putting a +1/+1 counter on Herd Baloth, and any other desired creature(s) if applicable.
  7. Repeat from step 2.

Combo 3 with Long Feng, Grand Secretariat + Verdant Succession

Results: Infinite LTB · Infinite ETB · Infinite sacrifice triggers · Infinite death triggers · Infinite mill · Infinite self-mill · Infinite +1/+1 counters on creatures you control
Show steps
  1. Activate Altar of Dementia by sacrificing Moss-Pit Skeleton.
  2. When Moss-Pit Skeleton dies, Long Feng and Verdant Succession trigger.
  3. Resolve the Long Feng trigger, putting a +1/+1 counter on a creature you control.
  4. Moss-Pit Skeleton triggers, putting itself from your graveyard onto the top of your library.
  5. Resolve the Verdant Succession trigger, searching your library for Moss-Pit Skeleton and putting it onto the battlefield.
  6. Resolve the Altar of Dementia ability.
  7. Repeat.
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