Cast Incarnation Technique by paying its mana cost, targeting any applicable target.
Holding priority, cast Dualcaster Mage by paying its mana cost.
When Dualcaster Mage enters, it triggers, targeting Incarnation Technique.
Holding priority, activate Viscera Seer by sacrificing Dualcaster Mage.
Resolve the Dualcaster Mage trigger, copying Incarnation Technique, with the copy targeting Dualcaster Mage
Resolve the Incarnation Technique copy, returning Dualcaster Mage from your graveyard to the battlefield.
Repeat from step 3.
This clever loop turns a flashy graveyard spell into a self-sustaining engine by exploiting Dualcaster Mage's reflexive entry trigger to endlessly copy itself. When you cast Incarnation Technique, Dualcaster Mage jumps in to copy it right away, while Viscera Seer sits ready on the board to feed the mage to the graveyard the moment the trigger is on the stack. The copy of Incarnation Technique then resolves to fish Dualcaster Mage right back out of the yard, triggering its enter-the-battlefield ability anew and letting you repeat the entire cycle. Along the way, Viscera Seer lets you sift infinitely through your deck with scry triggers while cashing in on an endless stream of sacrifices, death triggers, and self-milling.