When Diregraf Horde enters the battlefield, it and Deadeye Navigator's soulbond ability triggers.
Resolve the Deadeye Navigator trigger, repairing it and Diregraf Horde.
Resolve the Diregraf Horde trigger, creating two 2/2 Zombie creature tokens.
Activate Ashnod's Altar by sacrificing a Zombie, adding CC.
Repeat.
This clever loop turns standard re-entry into a mana-positive engine by making every piece work in absolute harmony. With Mycosynth Lattice turning the entire board into artifacts and making everything colorless, Ashnod's Altar eagerly accepts any sacrifice for heavy mana production. You use that generated mana to activate Deadeye Navigator's soulbond-granted ability, repeatedly blinking Diregraf Horde. Each time Diregraf Horde returns to the battlefield, it floods your board with fresh tokens to feed right back into Ashnod's Altar, fueling the cycle infinitely.