Requires

Ghyrson Starn, Kelermorph must be on the battlefield. Gisela, Blade of Goldnight must be on the battlefield. Sakashima of a Thousand Faces must be on the battlefield (as a copy of Ghyrson Starn.). Harmless Offering must be in hand. You have a way to deal exactly two or three damage to an opponent. Mana needed:

Steps

1. Cast Harmless Offering by paying its mana cost, giving control of Gisela to an opponent.
2. Deal exactly two or three damage to the opponent, which is reduced to one by Gisela, triggering Ghyrson Starn and Sakashima of a Thousand Faces.
3. Resolve the Ghyrson Starn trigger, dealing 1 damage to the opponent.
4. Sakashima of a Thousand Faces triggers, dealing 1 damage to the opponent.
5. Ghyrson Starn triggers, dealing 1 damage to the opponent.
6. Repeat from step 4.

Results