Exchange of Words, Wormfang Manta, Aminatou, the Fateshifter, Carth the Lion, and Opalescence

Prerequisites

• Exchange of Words in hand
• Wormfang Manta on the battlefield
• Aminatou, the Fateshifter on the battlefield
• Carth the Lion on the battlefield
• Opalescence 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 by putting 0 loyalty counter on them due to Carth the Lion, blinking Exchange of Words
4. 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
5. When Exchange of Words enters, it triggers, exchanging the text boxes of itself and Wormfang Manta
6. Repeat from step 3 each turn

Results

• Infinite turns
• Lock