Retrofitter Foundry + Krark-Clan Ironworks + Clock of Omens + Mondrak, Glory Dominus

Retrofitter Foundry

Krark-Clan Ironworks

Clock of Omens

Mondrak, Glory Dominus

How it works

1. Activate Retrofitter Foundry's second ability by paying 2 and tapping it, creating two 1/1 Servo artifact creature tokens.
2. Activate Clock of Omens by tapping the Servos, untapping Retrofitter Foundry.
3. Activate Ashnod's Altar by sacrificing a Servo, adding CC.
4. Repeat.
5. Once you have infinite mana, you may instead use Retrofitter Foundry's first ability to untap it and get infinite untapped Servo tokens.

This loop transforms a modest artifact workshop into an engine of exponential growth, fueled by the replication power of Mondrak, Glory Dominus to double every single token you create. You begin by tapping Retrofitter Foundry to produce Servos, but thanks to Mondrak's replacement effect, you get a double dose of bodies to work with. Those extra tokens are immediately put to good use by Clock of Omens, letting you tap your artifacts to keep untapping the Foundry, while Krark-Clan Ironworks steps in to sacrifice a Servo for colorless mana whenever you need to fund the process. By cycling the Foundry's token creation and untaps while feeding the Ironworks, you generate infinite mana and an overwhelming horde of artifact creatures.