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

Prerequisites

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

Steps

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

Results

• Infinite landfall triggers
• Infinite tapped Vault of Whispers tokens