Goblin Bombardment + Naru Meha, Master Wizard + Prison Break

Goblin Bombardment

Naru Meha, Master Wizard

Prison Break

How it works

1. Cast Prison Break either from your hand by paying 4 or from your graveyard for its mayhem cost by paying 3, targeting any applicable target.
2. Holding priority, cast Naru Meha by paying its mana cost.
3. When Naru Meha enters, it triggers, targeting Prison Break.
4. Holding priority, activate Goblin Bombardment by sacrificing Naru Meha.
5. Resolve the Naru Meha trigger, copying Prison Break, with the copy targeting Naru Meha
6. Resolve the Prison Break copy, returning Naru Meha from your graveyard to the battlefield.
7. Repeat from step 3.

This loop relies on an infinite recursion of spell-copying and graveyard recursion to close out a game. By casting Prison Break to target a creature in your graveyard, you set the stage for Naru Meha, Master Wizard, whose enters-the-battlefield ability targets and copies the original sorcery. As Naru Meha enters, you can sacrifice it to Goblin Bombardment to deal 1 damage, letting the resulting copy of Prison Break resurrect Naru Meha right back to the battlefield to repeat the entire process indefinitely.