Yarus, Roar of the Old Gods + Karlov Watchdog + Woe Strider + Harmless Offering

Yarus, Roar of the Old Gods

Karlov Watchdog

Woe Strider

Harmless Offering

How it works

1. Cast Harmless Offering by paying its mana cost, giving control of Karlov Watchdog to an opponent.
2. During the opponent's turn, activate Woe Strider 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 Woe Strider ability.
5. Repeat from step 2.