Wormfang Manta + Mistmeadow Witch + Doorkeeper Thrull

Wormfang Manta

Mistmeadow Witch

Doorkeeper Thrull

How it works

1. Blink Wormfang Manta using Mistmeadow Witch. Wormfang Manta's first ability won't trigger due to Doorkeeper Thrull.
2. Wormfang Manta's second ability triggers, causing you to take an extra turn after this one.
3. Repeat each turn.

This clever loop hinges on turning Wormfang Manta's notoriously dangerous drawback into an engine for infinite turns. By using Mistmeadow Witch to repeatedly exile and return the Manta, you ensure that its leaves-the-battlefield trigger keeps resolving to stack up extra turns. The magic really happens because Doorkeeper Thrull is on the battlefield: its static ability completely suppresses the Manta's entering-the-battlefield trigger, meaning you reap the reward of the extra turn without ever having to skip your next turn in the process.