Prototype Portal + Clock of Omens + Grinding Station + Ancient Den
Clock of Omens
Ancient Den exiled by Prototype Portal. All other permanents on the battlefield.
- Activate Prototype Portal by paying and tapping it, creating a token copy of Ancient Den
- The Ancient Den token enters, triggering Grinding Station, untapping Grinding Station
- Activate Clock of Omens by tapping the Ancient Den token and Grinding Station, untapping Prototype Portal
Infinite landfall triggers. Infinite tapped land tokens.