Zirda, the Dawnwaker + Dino DNA + Krark-Clan Ironworks + Cathodion

Zirda, the Dawnwaker

Dino DNA

Krark-Clan Ironworks

Cathodion

How it works

1. Activate Dino DNA's second ability by paying 4, creating a token copy of Cathodion that is a 6/6 Dinosaur.
2. Activate Krark-Clan Ironworks by sacrificing the Cathodion token, adding CC.
3. When the Cathodion token dies, it triggers, adding CCC.
4. Repeat.

This clever loop relies on Zirda, the Dawnwaker to dramatically slash the activation cost of Dino DNA's token-creation ability from six mana down to a manageable four. Once you pay that reduced cost to create a token copy of Cathodion, you immediately feed that newborn artifact creature to Krark-Clan Ironworks for two colorless mana. Because that sacrifice causes Cathodion to die, its own death trigger adds three more mana to your pool, turning a net positive profit of one colorless mana on every single iteration. You can repeat this loop as many times as you like, generating infinite colorless mana and an endless army of giant Dinosaur copies of any creature card previously exiled by Dino DNA.