Missy + Ashnod's Altar + Horde Ambusher

Missy

Ashnod's Altar

Horde Ambusher

How it works

1. Activate Ashnod's Altar by sacrificing Horde Ambusher, adding CC.
2. When Horde Ambusher dies, Missy's first ability triggers, returning Horde Ambusher from your graveyard to the battlefield face down as a 2/2 Cyberman artifact creature.
3. Activate Horde Ambusher's morph ability by revealing a red card from your hand, turning it face up.
4. Repeat.

This loop turns Ashnod's Altar into a continuous engine by exploiting Missy's ability to constantly resurrect your fallen troops as cyberized artifacts. When Horde Ambusher hits the graveyard, Missy immediately pulls it back to the battlefield face down and tapped, resetting its potential. From there, you simply use Horde Ambusher's built-in morph mechanic—paid for by revealing a red card in your hand—to turn it face up, clearing the way to sacrifice it back to Ashnod's Altar for more colorless mana.