Yarus, Roar of the Old Gods + Karlov Watchdog + Umbral Collar Zealot + Bilbo, Luckwearer // Burglar's Plot

Yarus, Roar of the Old Gods

Karlov Watchdog

Umbral Collar Zealot

Bilbo, Luckwearer // Burglar's Plot

How it works

1. Donate Karlov Watchdog to an opponent.
2. During the opponent's turn, activate Umbral Collar Zealot by sacrificing a face-down creature you control.
3. When the creature dies, Yarus's second ability triggers, returning it from your graveyard to the battlefield face-down as a 2/2 creature, and then not turning it face-up due to Karlov Watchdog.
4. Resolve the Umbral Collar Zealot ability.
5. Repeat from step 2.