Exchange of Words + Starfield of Nyx + Wormfang Manta + Soulherder

Exchange of Words

Starfield of Nyx

Wormfang Manta

Soulherder

How it works

1. Cast Exchange of Words by paying 1.
2. When Exchange of Words enters the battlefield, it triggers, exchanging the text boxes of it and Wormfang Manta.
3. At the beginning of your end step, Soulherder triggers, 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.