Edgar, Master Machinist + Eldrazi Displacer + Cathodion + Herald of Kozilek + Krark-Clan Ironworks

Edgar, Master Machinist

Eldrazi Displacer

Cathodion

Herald of Kozilek

Krark-Clan Ironworks

How it works

1. Activate Krark-Clan Ironworks by sacrificing Cathodion, adding CC.
2. When Cathodion dies, it triggers, adding CCC.
3. Activate Eldrazi Displacer by paying 2C, blinking Edgar.
4. Cast Cathodion from your graveyard by paying 2.
5. Repeat.

This loop creates an engine fueled by a clever mana-positive sacrifice chain: when you sacrifice Cathodion to Krark-Clan Ironworks, its death trigger combined with the sacrifice itself yields a surplus of colorless mana. To bring it back, Eldrazi Displacer's activation is discounted by Herald of Kozilek, while Edgar, Master Machinist allows you to recast Cathodion directly from your graveyard. Because Edgar, Master Machinist itself is repeatedly blinked by Eldrazi Displacer's ability, its once-per-turn restriction resets, letting you cast Cathodion over and over to generate infinite sacrifice and enter-the-battlefield triggers.