Exchange of Words, Starfield of Nyx, Wormfang Manta, and Eldrazi Displacer

Prerequisites

• Exchange of Words in hand
• Starfield of Nyx on the battlefield
• Wormfang Manta on the battlefield
• Eldrazi Displacer on the battlefield
• undefined the first turn with each extra turn available

Steps

1. Cast Exchange of Words by paying
2. When Exchange of Words enters the battlefield, it triggers, exchanging the text boxes of it and Wormfang Manta
3. Activate Eldrazi Displacer by paying , blinking Exchange of Words
4. Exchange of Words leaves and enters the battlefield, triggering the second ability it gained from Wormfang Manta's textbox as well as its own ability
5. Resolve the first Exchange of Words trigger, causing you to take an extra turn after this one
6. Resolve the second Exchange of Words trigger, exchanging the text boxes of it and Wormfang Manta
7. Repeat from step 3 during each turn

Results

• Infinite turns