Prototype Portal + Clock of Omens + Grinding Station + Treasure Vault

Prototype Portal

Clock of Omens

Grinding Station

Treasure Vault

How it works

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