Cloudstone Curio + Phyrexian Dreadnought + Ashnod's Altar + Life Finds a Way

Cloudstone Curio

Phyrexian Dreadnought

Ashnod's Altar

Life Finds a Way

How it works

1. Cast Phyrexian Dreadnought by paying 1.
2. When Phyrexian Dreadnought enters the battlefield, it and Life Finds a Way trigger.
3. Resolve the Life Finds a Way trigger, creating a copy of any nonartifact creature token you control.
4. When the creature token enters the battlefield, Cloudstone Curio triggers, returning Phyrexian Dreadnought to your hand from the battlefield.
5. Resolve the Phyrexian Dreadnought trigger from sttep 2, doing nothing.
6. Activate Ashnod's Altar by sacrificing a creature token, adding CC.
7. Repeat.
8. Once you have infinite C, you may forego sacrificing the creature tokens.

This clever loop centers around Phyrexian Dreadnought, which cleverly sidesteps its own punishing sacrifice clause by immediately triggering Cloudstone Curio when it enters the battlefield. As the Curio returns the Dreadnought to your hand, Life Finds a Way triggers off the entry of your massive creature to populate your existing creature tokens. You can then feed those copied tokens into Ashnod's Altar to generate the colorless mana needed to recast the Dreadnought over and over again, leaving you with an unstoppable cascade of infinite tokens and mana.