Deal exactly one damage to an opponent, triggering Ghyrson Starn and Sakashima.
Holding priority, activate Zedruu by paying ({R} magic symbol) ({W} magic symbol) ({U} magic symbol) , giving control of Gisela to the opponent.
Resolve the Ghyrson Starn trigger, dealing 1 damage to the opponent.
Sakshima triggers, dealing 1 damage to the opponent.
Ghyrson Starn triggers, dealing 1 damage to the opponent.
Repeat from step 4.
If you have multiple methods of dealing 1 damage to an opponent, you may repeat this process for each opponent once you regain control of Gisela after the opponent loses the game.