Cast Vincent's Limit Break by paying its mana cost.
Holding priority, cast Dualcaster Mage by paying its mana cost.
When Dualcaster Mage enters, it triggers, copying Vincent's Limit Break, with the copy targeting Dualcaster Mage.
Resolve the copy of Vincent's Limit Break.
Holding priority, activate Goblin Bombardment by sacrificing Dualcaster Mage.
When Dualcaster Mage dies, it triggers, returning it from your graveyard to the battlefield.
Repeat from step 3.
Resolve all Goblin Bombardment abilities from step 5.
This brilliant loop lets you turn an ordinary spell into an endless engine of destruction, fueled entirely by the synergy of three key pieces. By targeting your newly cast Dualcaster Mage with a copy of Vincent's Limit Break, you grant the wizard a persistent resurrection trigger every time it meets its end. From there, Goblin Bombardment provides the necessary outlet to sacrifice the mage on command, dealing lethal damage while sending it straight to the graveyard only to immediately bounce right back to the battlefield and repeat the process.