Edgar, Master Machinist + Eldrazi Displacer + Cathodion + Ashnod's Altar + Stone Calendar

Edgar, Master Machinist

Eldrazi Displacer

Cathodion

Ashnod's Altar

Stone Calendar

How it works

1. Activate Ashnod's Altar 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 elegant loop relies on Cathodion's dying trigger yielding more mana than Ashnod's Altar demands, generating a net surplus of colorless mana with every iteration. To keep the engine running, Eldrazi Displacer uses that excess fuel to blink Edgar, Master Machinist, whose static ability conveniently permits you to cast artifacts directly from your graveyard. Meanwhile, Stone Calendar quietly reduces that casting cost down to just two mana, ensuring the loop stays positive.