Initial Card State
- Harmless Offering in hand.
- All permanents on the battlefield.
Notable Prerequisites
- You control a face-down creature whose front face is a permanent card.
- You have enough mana to cast Harmless Offering.
Steps
- Cast Harmless Offering by paying its mana cost, giving control of Karlov Watchdog to an opponent.
- During the opponent's turn, activate Altar of Dementia by sacrificing a face-down creature you control.
- 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.
- Resolve the Altar of Dementia ability.
- Repeat from step 2.
Results
- Infinite LTB.
- Infinite ETB.
- Infinite sacrifice triggers.
- Infinite death triggers.
- Infinite mill.
- Infinite self-mill.
Bracket Tag
This combo has been estimated to be Exhibition (Bracket 1+).