Altar of Dementia + Dualcaster Mage + Incarnation Technique

Altar of Dementia

Dualcaster Mage

Incarnation Technique

How it works

1. Cast Incarnation Technique 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 Incarnation Technique.
4. Holding priority, activate Altar of Dementia by sacrificing Dualcaster Mage.
5. Resolve the Dualcaster Mage trigger, copying Incarnation Technique, with the copy targeting Dualcaster Mage
6. Resolve the Incarnation Technique copy, returning Dualcaster Mage from your graveyard to the battlefield.
7. Repeat from step 3.

This clever loop uses Incarnation Technique and its demonstrate mechanic to jumpstart a recursive graveyard dance, fueled by Dualcaster Mage entering the battlefield to continually copy the original spell. Because Incarnation Technique returns Dualcaster Mage straight from the graveyard to the battlefield, you have an endless supply of fodder for Altar of Dementia to endlessly sacrifice it. As a delightful bonus, Altar of Dementia turns those perpetual sacrifices into an infinite mill stream, letting you devour your opponents' libraries while looping your creature infinitely.