Xathrid Necromancer + Phyrexian Altar + Conspiracy

Xathrid Necromancer

Phyrexian Altar

Conspiracy

How it works

1. Activate Phyrexian Altar by sacrificing any other creature.
2. When the creature dies as a Human due to Conspiracy, Xathrid Necromancer triggers, creating a 2/2 Zombie creature token.
3. Repeat.

This loop is a masterclass in identity-shifting synergy, anchored entirely by Conspiracy renaming every creature you own to match Xathrid Necromancer's strict tribal demands. Once that enchantment rewrites the rules of the battlefield, any creature you feed into Phyrexian Altar immediately dies as a Human, triggering the Necromancer to replace it with a fresh Zombie token. You can then sacrifice that very Zombie back to the Altar for mana, creating an endless, self-sustaining cycle that continuously generates colored mana alongside an infinite stream of death, sacrifice, and entry triggers.