Arcane Bombardment + Prismari Command + Return the Favor

Mana needed: {2}{R}{R} plus the mana needed to cast the additional instant/sorcery

UR identity

Commander legal

The 3 combo pieces

What must be in place

You have no instants and/or sorceries in your graveyard.
You have an additional instant or sorcery card in hand.
You have not cast an instant or sorcery this turn.

How to execute it

  1. Cast any other instant or sorcery by paying its mana cost, triggering Arcane Bombardment.
  2. Holding priority, cast Return the Favor by paying {R}{R} and then choosing to pay an additional {1} to select its first mode, copying the Arcane Bombardment trigger.
  3. Resolve the copy of the Arcane Bombardment trigger, exiling Return the Favor from your graveyard and then copying Return the Favor, Prismari Command and all other cards exiled by Arcane Bombardment, and allowing you to cast those copies without paying their mana costs.
  4. As you cast the Return the Favor copy, choose to pay an additional {1} to select its first mode, targeting the Arcane Bombardment trigger.
  5. Resolve the copy of Prismari Command, creating a Treasure token and choosing any other mode.
  6. Activate the Treasure by tapping and sacrificing it, adding {1}.
  7. Resolve the copy of Return the Favor, copying the Arcane Bombardment trigger.
  8. Repeat from step 3.

What the combo produces