Cayth, Famed Mechanist + Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Umbral Collar Zealot

WUBR identity

Commander legal

The 3 combo pieces

How to execute it

  1. Activate Umbral Collar Zealot by sacrificing Cayth.
  2. When Cayth dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
  3. When Cayth enters, its fabricate ability triggers, putting a +1/+1 counter on it.
  4. Resolve the Umbral Collar Zealot ability.
  5. Repeat.

What the combo produces