Umbral Collar Zealot + Dualcaster Mage + Extract from Darkness

Umbral Collar Zealot

Dualcaster Mage

Extract from Darkness

How it works

1. Cast Extract from Darkness by paying its mana cost
2. Holding priority, cast Dualcaster Mage by paying its mana cost.
3. When Dualcaster Mage enters, it triggers, targeting Extract from Darkness.
4. Holding priority, activate Umbral Collar Zealot by sacrificing Dualcaster Mage.
5. Resolve the Dualcaster Mage trigger, copying Extract from Darkness
6. Resolve the Extract from Darkness copy, causing each player to mill two cards and returning Dualcaster Mage from your graveyard to the battlefield.
7. Repeat from step 3.

This clever loop relies on an endless cycle of resurrection and sacrifice, perfectly suited for formats like Commander and Legacy. You kick things off by casting Extract from Darkness to mill and set up your graveyard, immediately backing it up with Dualcaster Mage to copy the spell upon entry. By using Umbral Collar Zealot to sacrifice Dualcaster Mage before the copy resolves, you quietly feed the graveyard while fueling your surveil triggers. The resulting copy of Extract from Darkness then brings Dualcaster Mage right back from the dead to repeat the process, turning a single pair of spells into an infinite engine of death and mill triggers.