Viscera Seer + Dualcaster Mage + Behold the Sinister Six!

Viscera Seer

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 Viscera Seer 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 relies on an infinite recursion engine fueled by a clever interplay between your graveyard and the stack. By casting Behold the Sinister Six!, you set up the fodder needed to retrieve your pieces, while Dualcaster Mage steps in upon entering the battlefield to copy that very spell. To keep the chain going, you use Viscera Seer to sacrifice the Mage before its copy resolves, binning it just in time for the copied Behold the Sinister Six! to pluck it right back out of the graveyard and back onto the battlefield.