Fork + Twincast

Mana needed: {U}{U}{R}{R}, plus enough mana to cast the additional spell if needed

UR identity

Commander legal

The 2 combo pieces

What must be in place

You have a way to cast an additional instant or sorcery, or an opponent is casting one.

How to execute it

  1. Cast any instant or sorcery spell, or wait for an opponent to cast one.
  2. Holding priority, cast Fork by paying {R}{R}, targeting that spell.
  3. Cast Twincast by paying {U}{U}, copying Fork, with the copy targeting Fork.
  4. Resolve the copy of Fork, copying the original Fork, with the copy targeting the original Fork.
  5. Repeat step 4.

What the combo produces