This is how Morro plans revenge with Ryvine in Sci-Ryan's and Clay's Time Travel Adventure.
[In another place, Ryvine meets up with Morro]
Ryvine Sparkle: Morro. You're back. Where's Jestro and the Book of Monsters?
Morro: They reformed and went to the good side.
Ryvine Sparkle: We must go back in time and make sure they never reform.
Morro: No. We can't. If we do it again, the space-time continuum will be ruptured.
Ryvine Sparkle: I don't care. Jestro is a villain and always will be.[then gets hit on the head by the Book of Monsters (Bad Clone)]
Book of Monsters (Bad Clone): Are you ok?
[Ryvine nods]
Makuta: We must find a way to deform Sunset, Jestro, and that book.
Umarak: They are perfect and I am the hunter.
Ryvine Sparkle: You were. Now you are my student.
Umarak: I'll learn about dark friendship. [puts on the Mask of Control and green aura comes out of him]
Ryvine Sparkle: As strong as you think Jestro is. We are stronger. There are events that must transpire so Jestro, the book and Sunset remain bad guys once and for all. You are Hunter no more. You are my minion. You are Destroyer.
[Umarak's shadow turns into the shape of Umarak the Destroyer]
Book of Monsters (Bad Clone): Wow. I didn't know.
Ryvine Sparkle: Well. I'll go back in time and help Romeo make the villain-deform-inator.[to Morro] I'm not really breaking the laws of time, but I am bending them a little.
[Ryvine travels back in time, change the Book of Monster's and Jestro's reformations and comes back with Romeo's invention]
Ryvine Sparkle: Ok. One of those plans will be in another time travel adventure.
Jestro: Ryvine. I want to learn your evil ways.
Ryvine Sparkle: Ok, Jestro. You need to get Rianna on your side.
[Jestro laughs evilly]
[Meanwhile, the real Jestro is turned back to evil]
Starlight Glimmer: See, Jestro? There is really another way.
Jestro: I know that now. And I want to be like you after you reformed. All I did ever since being bad was tear everyone apart. I didn't know the first thing about friendship. But I want to be evil with my sister from now on.
[He leaves]
Starlight Glimmer: Guess he's not learning.
[Starlight leaves the room, ending the film]