Prototype Portal, Clock of Omens, Grinding Station, and Seat of the Synod

Prerequisites

• Prototype Portal on the battlefield
• Clock of Omens on the battlefield
• Grinding Station on the battlefield
• Seat of the Synod in exile

Steps

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

Results

• Infinite landfall triggers
• Infinite tapped land tokens