Bolas's Citadel + Dross Harvester + Golgari Thug + Umbral Collar Zealot

B identity

Commander legal

The 4 combo pieces

How to execute it

  1. Activate Umbral Collar Zealot by sacrificing Golgari Thug.
  2. When Golgari Thug dies, it and Dross Harvester trigger.
  3. Resolve the Golgari Thug trigger, putting it from your graveyard onto the top of your library.
  4. Resolve the Dross Harvester trigger, causing you to gain 2 life.
  5. Resolve the Umbral Collar Zealot ability.
  6. Cast Golgari Thug from the top of your library by paying 2 life.
  7. Repeat.

What the combo produces