Double Major + Ghyrson Starn, Kelermorph + Gisela, Blade of Goldnight + Switcheroo

Mana needed: {1}{G}{U}{U}{R}

RGWU identity

Commander legal

The 4 combo pieces

What must be in place

An opponent controls a creature.
You have a way to deal exactly two or three damage to an opponent.
You have enough mana to cast Switcheroo.

How to execute it

  1. Cast Switcheroo by paying its mana cost, giving control of Gisela to an opponent.
  2. Cast Ghyrson Starn by paying {1}{U}{R}.
  3. Holding priority, cast Double Major by paying {G}{U}, creating a copy of the Ghyrson Starn spell that isn't legendary.
  4. Resolve both Ghyrson Starn spells.
  5. Deal exactly two or three damage to the opponent, which is reduced to one by Gisela, triggering Ghyrson Starn and the Ghyrson Starn token.
  6. Resolve the nontoken Ghyrson Starn's trigger, dealing 1 damage to the opponent.
  7. The token Ghyrson Starn triggers, dealing 1 damage to the opponent.
  8. The nontoken Ghyrson Starn triggers, dealing 1 damage to the opponent.
  9. Repeat from step 7.

What the combo produces