Exchange of Words, Wormfang Manta, Aminatou, the Fateshifter, Oath of Teferi, and Starfield of Nyx

Prerequisites

• Exchange of Words in hand
• Wormfang Manta on the battlefield
• Aminatou, the Fateshifter on the battlefield
• Oath of Teferi on the battlefield
• Starfield of Nyx on the battlefield
• available

Steps

1. Cast Exchange of Words by paying
2. When Exchange of Words enters, it triggers, exchanging the text boxes of itself and Wormfang Manta
3. Activate Aminatou's first ability by putting a loyalty counter on it, causing you to loot
4. Activate Aminatou's second ability by removing a loyalty counter from it, blinking Exchange of Words
5. When Exchange of Words leaves the battlefield, its ability from Wormfang Manta's textbox triggers, causing you to take an extra turn after this one
6. When Exchange of Words enters, it triggers, exchanging the text boxes of itself and Wormfang Manta
7. Repeat from step 3 each turn

Results

• Infinite turns
• Lock