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

Prerequisites

• Retrofitter Foundry on the battlefield
• Krark-Clan Ironworks on the battlefield
• Clock of Omens on the battlefield
• Kaya, Geist Hunter on the battlefield
• Kaya has at least two loyalty counters on it
• available

Steps

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 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
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

Results

• Infinite colorless mana
• Infinite creature tokens
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite mana artifacts you control can produce
• Infinite sacrifice triggers
• Infinite untap of artifacts you control