Roon of the Hidden Realm, Wormfang Manta, and Torpor Orb

Prerequisites

• Roon of the Hidden Realm on the battlefield
• Wormfang Manta on the battlefield
• Torpor Orb on the battlefield
• Roon of the Hidden Realm does not have summoning sickness
• each turn available

Steps

1. Activate Roon of the Hidden Realm by paying and tapping it, exiling Wormfang Manta until your end step
2. When Wormfang Manta leaves the battlefield, its second ability triggers, causing you to take an extra turn after this one
3. At the beginning of your end step, Roon of the Hidden Realm triggers, returning Wormfang Manta to the battlefield from exile
4. Wormfang Manta's first ability does not trigger due to Torpor Orb
5. Repeat each turn

Results

• Infinite turns