Dualcaster Mage + Corpse Dance + Bloodflow Connoisseur

Dualcaster Mage

Corpse Dance

Bloodflow Connoisseur

How it works

1. Cast Corpse Dance by paying its mana cost, targeting any applicable target.
2. Holding priority, cast Dualcaster Mage by paying its mana cost.
3. When Dualcaster Mage enters, it triggers, targeting Corpse Dance.
4. Holding priority, activate Bloodflow Connoisseur by sacrificing Dualcaster Mage.
5. Resolve the Dualcaster Mage trigger, copying Corpse Dance, with the copy targeting Dualcaster Mage
6. Resolve the Corpse Dance copy, returning Dualcaster Mage from your graveyard to the battlefield.
7. Repeat from step 3.

This clever loop spins up an endless engine by continuously recycling Corpse Dance through Dualcaster Mage. While Corpse Dance plucks your wizard back from the graveyard, Bloodflow Connoisseur provides a convenient outlet to sacrifice Dualcaster Mage right back into the dirt, setting the stage for its enter-the-battlefield trigger to copy the spell all over again. Because Corpse Dance gives the returned creature haste and eventually exiles it during the end step, sacrificing it proactively to Bloodflow Connoisseur completely circumvents that restriction while amassing an infinite horde of sacrifice triggers and growing the Connoisseur to astronomical proportions.