Gravecrawler + Grimgrin, Corpse-Born + Pitiless Plunderer

UB identity

Commander legal

The 3 combo pieces

How to execute it

  1. Activate Grimgrin by sacrificing Gravecrawler.
  2. Gravecrawler dies, triggering Pitiless Plunderer, creating a Treasure token.
  3. Resolve the Grimgrin ability, untapping it and putting a +1/+1 counter on it.
  4. Activate the Treasure by tapping and sacrificing it, adding {B}.
  5. Cast Gravecrawler from your graveyard by paying {B}.
  6. Repeat.

What the combo produces