Retrofitter Foundry + Krark-Clan Ironworks + Clock of Omens + Kaya, Geist Hunter

Retrofitter Foundry

Krark-Clan Ironworks

Clock of Omens

Kaya, Geist Hunter

How it works

1. Activate Kaya's second loyalty ability by removing two loyalty counters from it, causing you to double any tokens you create this turn.
2. Activate Retrofitter Foundry's second ability by paying 2 and tapping it, creating two 1/1 Servo artifact creature tokens.
3. Activate Clock of Omens by tapping the Servos, untapping Retrofitter Foundry.
4. Activate Ashnod's Altar by sacrificing a Servo, adding CC.
5. Repeat from step 2.
6. 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 relies on Kaya, Geist Hunter's minus ability to double your token production, allowing Retrofitter Foundry to pump out multiple Servos for a fraction of their normal cost. Once those tokens hit the board, Clock of Omens uses them as disposable fodder to continuously untap the Foundry, while Krark-Clan Ironworks happily converts the excess artifacts into a steady stream of colorless mana. Together, this mechanical alchemy churns out an endless supply of metal and mana to overwhelm the table.