Knight of the Aeon Stream

Whenever you cast an instant or sorcery spell, change the text of that spell to 'create a token that's a copy of Knight of the Aeon Stream.'
When Knight of the Aeon Stream dies, exile it and each other creature with the same name. Then, if five or more creatures were exiled this way, take an extra turn after this one.
"Time isn't a thread, it's a mo