Prototype Portal, Clock of Omens, Battered Golem, and Treasure Vault

Prerequisites

• Prototype Portal on the battlefield
• Clock of Omens on the battlefield
• Battered Golem on the battlefield
• Treasure Vault in exile

Steps

1. Activate Prototype Portal by paying , creating a token copy of Treasure Vault
2. When the Treasure Vault token enters the battlefield, Battered Golem triggers, untapping itself
3. Activate Clock of Omens by tapping Battered Golem and the Treasure Vault token, untapping Prototype Portal
4. Repeat

Results

• Infinite landfall triggers
• Infinite tapped Mountain tokens
• Infinite tapped Island tokens
• Infinite tapped Forest tokens
• Infinite tapped Plains tokens
• Infinite tapped Swamp tokens
• Infinite tapped copies of a specific land