Arcane Adaptation + Overseer of the Damned + Reaper King

WUBRG identity

Commander legal

The 3 combo pieces

What must be in place

You have a way to cause a creature to enter the battlefield.
"Scarecrow" chosen with Arcane Adaptation.

How to execute it

  1. Cause a creature to enter the battlefield.
  2. Reaper King triggers, destroying target nontoken creature an opponent controls.
  3. The creature dies, triggering Overseer of the Damned, creating a 2/2 Zombie creature token.
  4. The Zombie enters the battlefield as a Scarecrow due to Arcane Adaptation, triggering Reaper King, destroying target nontoken creature an opponent controls.
  5. Repeat from step 3.
  6. This loop will also repeat whenever another creature enters the battlefield under your control.

What the combo produces