Diregraf Horde + Deadeye Navigator + Phyrexian Altar

Diregraf Horde

Deadeye Navigator

Phyrexian Altar

How it works

1. Activate Diregraf Horde by paying 1, blinking it.
2. When Diregraf Horde enters the battlefield, it and Deadeye Navigator's soulbond ability triggers.
3. Resolve the Deadeye Navigator trigger, repairing it and Diregraf Horde.
4. Resolve the Diregraf Horde trigger, creating two 2/2 Zombie creature tokens.
5. Activate Phyrexian Altar twice by sacrificing the Zombies, adding 1.
6. Repeat.

By bonding Deadeye Navigator to Diregraf Horde, you gain the ability to repeatedly flicker the Horde for {1}{U} while leaving enough mana over to fund the loop. Each time Diregraf Horde returns, its entry triggers create two decayed Zombie tokens, which can immediately be fed into Phyrexian Altar to generate the exact mana needed to activate Deadeye Navigator's blink ability once again. This creates a self-sustaining engine of endless entries, leaves, and sacrifices that completely overwhelms the battlefield with infinite triggers.