Altar of Dementia + Putrid Goblin + Thran Vigil

B identity

Commander legal

The 3 combo pieces

How to execute it

  1. Activate Altar of Dementia by sacrificing Putrid Goblin.
  2. When Putrid Goblin dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
  3. Thran Vigil triggers, putting a +1/+1 counter on Putrid Goblin.
  4. Resolve the Altar of Dementia ability.
  5. Repeat.

What the combo produces