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.
Holding priority, cast Dualcaster Mage by paying its mana cost.
When Dualcaster Mage enters, it triggers, targeting Prison Break.
Holding priority, activate Goblin Bombardment by sacrificing Dualcaster Mage.
Resolve the Dualcaster Mage trigger, copying Prison Break, with the copy targeting Dualcaster Mage
Resolve the Prison Break copy, returning Dualcaster Mage from your graveyard to the battlefield.
Repeat from step 3.
This brilliant loop harnesses Dualcaster Mage to endlessly copy Prison Break, creating an unending cycle where the Mage repeatedly enters the battlefield and brings itself right back from the graveyard. Goblin Bombardment serves as our fatal outlet, transforming that endless parade of dying mages into an unstoppable stream of direct damage to any target. Because Prison Break keeps returning the Dualcaster Mage with a +1/+1 counter and you can sacrifice it in response to its own copy trigger, the entire engine runs on autopilot to incinerate your opponents on the spot.