Yarus, Roar of the Old Gods + Karlov Watchdog + Blasting Station + Iroh, Tea Master

Yarus, Roar of the Old Gods

Karlov Watchdog

Blasting Station

Iroh, Tea Master

How it works

1. Donate Karlov Watchdog to an opponent.
2. During the opponent's turn, activate Blasting Station by tapping it and 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. When the creature enters, Blasting Station triggers, untapping Blasting Station.
5. Resolve the Blasting Station ability from step 2.
6. Repeat from step 2.