Retrofitter Foundry, Clock of Omens, Dreamstone Hedron, and Zirda, the Dawnwaker

Prerequisites

• Retrofitter Foundry on the battlefield
• Clock of Omens on the battlefield
• Dreamstone Hedron on the battlefield
• Zirda, the Dawnwaker on the battlefield
• available

Steps

1. Activate Retrofitter Foundry's second ability by paying and tapping it, creating a 1/1 Servo artifact creature token
2. Activate Retrofitter Foundry's first ability by paying , untapping it
3. Activate Clock of Omens by tapping Retrofitter Foundry and an untapped Servo token, untapping Dreamstone Hedron
4. Activate Dreamstone Hedron by tapping it, adding
5. Activate Retrofitter Foundry's first ability by paying , untapping it
6. Activate Retrofitter Foundry's third ability by paying , tapping it, and sacrificing a tapped Servo token, creating a 1/1 Thopter artifact creature token with flying
7. Activate Retrofitter Foundry's first ability by paying , untapping it
8. Activate Clock of Omens by tapping Retrofitter Foundry and an untapped Thopter token, untapping Dreamstone Hedron
9. Activate Dreamstone Hedron by tapping it, adding
10. Activate Retrofitter Foundry's first ability by paying , untapping it
11. Activate Retrofitter Foundry's fourth ability by tapping it and sacrificing a tapped Thopter token, creating a 4/4 Construct artifact creature token
12. Activate Retrofitter Foundry's first ability by paying , untapping it
13. Activate Clock of Omens by tapping Retrofitter Foundry and an untapped Construct token, untapping Dreamstone Hedron
14. Activate Dreamstone Hedron by tapping it, adding
15. Activate Retrofitter Foundry's first ability by paying , untapping it
16. Repeat

Results

• Infinite colorless mana
• Infinite creature tokens
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers