Arcane Bombardment + Prismari Command + Return the Favor

Prerequisites

• 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.

Steps

1. 1Cast any other instant or sorcery by paying its mana cost, triggering Arcane Bombardment.
2. 2Holding priority, cast Return the Favor by paying and then choosing to pay an additional to select its first mode, copying the Arcane Bombardment trigger.
3. 3Resolve 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. 4As you cast the Return the Favor copy, choose to pay an additional to select its first mode, targeting the Arcane Bombardment trigger.
5. 5Resolve the copy of Prismari Command, creating a Treasure token and choosing any other mode.
6. 6Activate the Treasure by tapping and sacrificing it, adding .
7. 7Resolve the copy of Return the Favor, copying the Arcane Bombardment trigger.
8. 8Repeat from step 3.

Effects

• Infinite damage
• Infinite draw triggers for any number of players
• Infinite looting for any number of players
• Infinite magecraft triggers
• Infinite self-discard triggers for any number of players
• Infinite storm count