Phyrexian Altar + Dualcaster Mage + Incarnation Technique

Phyrexian Altar

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 Phyrexian Altar 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 elegant loop turns a single spellcasting sequence into an unstoppable engine by leveraging Dualcaster Mage's clever enter-the-battlefield trigger to continually copy Incarnation Technique. Each time Incarnation Technique's copy resolves, it pulls Dualcaster Mage straight back out of your graveyard and onto the battlefield to re-trigger the copying process. Meanwhile, Phyrexian Altar provides the crucial sacrifice outlet that feeds this cycle while simultaneously generating a steady supply of colored mana to sustain your spells.