Clock of Omens + Darksteel Citadel + Grinding Station + Prototype Portal

C identity

Commander legal

The 4 combo pieces

• Clock of Omens
• Darksteel Citadel
• Grinding Station
• Prototype Portal

How to execute it

1. Activate Prototype Portal by paying {0} and tapping it, creating a token copy of Darksteel Citadel.
2. The Darksteel Citadel token enters, triggering Grinding Station, untapping Grinding Station.
3. Activate Clock of Omens by tapping the Darksteel Citadel token and Grinding Station, untapping Prototype Portal.
4. Repeat.

What the combo produces

• Infinite landfall triggers
• Infinite tapped land tokens