Goblin Bombardment + Dualcaster Mage + Behold the Sinister Six!

Goblin Bombardment

Dualcaster Mage

Behold the Sinister Six!

How it works

1. Cast Behold the Sinister Six! by paying its mana cost
2. Holding priority, cast Dualcaster Mage by paying its mana cost.
3. When Dualcaster Mage enters, it triggers, targeting Behold the Sinister Six!.
4. Holding priority, activate Goblin Bombardment by sacrificing Dualcaster Mage.
5. Resolve the Dualcaster Mage trigger, copying Behold the Sinister Six!, with the copy targeting Dualcaster Mage
6. Resolve the Behold the Sinister Six! copy, returning Dualcaster Mage from your graveyard to the battlefield.
7. Repeat from step 3.

This loop turns a massive graveyard into an endless engine of destruction, fueled entirely by the clever recursive targeting of Behold the Sinister Six! and Dualcaster Mage. Whenever Dualcaster Mage enters the battlefield, its triggered ability targets the original sorcery on the stack, but sacrificing it to Goblin Bombardment first ensures a steady stream of damage while leaving the way clear for the copy to bring Dualcaster Mage right back from the graveyard for another round.