Cast Supernatural Stamina by paying its mana cost.
Holding priority, cast Dualcaster Mage by paying its mana cost.
When Dualcaster Mage enters, it triggers, copying Supernatural Stamina, with the copy targeting Dualcaster Mage.
Resolve the copy of Supernatural Stamina.
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 vicious loop relies on a clever stacking of triggers to turn a simple flash creature into an endless engine of destruction. First, you cast Supernatural Stamina to prepare your wizard for a trip to the graveyard, then instantly drop Dualcaster Mage into the mix to intercept and copy that very same spell onto itself. Once the recursion is locked in, you can freely use Goblin Bombardment to sacrifice Dualcaster Mage for guaranteed damage, safe in the knowledge that its own death trigger will immediately return it to the battlefield to repeat the entire process indefinitely.