Fateful Handoff + Karlov Watchdog + Phyrexian Altar + Yarus, Roar of the Old Gods

BRGW identity

Commander legal

The 4 combo pieces

What must be in place

You control a face-down creature whose front face is a permanent card.
You have enough mana to cast Fateful Handoff.

How to execute it

  1. Cast Fateful Handoff by paying its mana cost, giving control of Karlov Watchdog to an opponent.
  2. During the opponent's turn, activate Phyrexian Altar by sacrificing a face-down creature you control, adding one mana of any color.
  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. Repeat from step 2.

What the combo produces