Stella uses the attack Sun Negator in this episode which blocks out the sun and makes it rain. This does not make sense as it should be an attack of Stormy's.
The witches are taken to Light Haven again.
When the Trix pull themselves out of the lake, they are wearing their season one outfits when before they were in their casual clothes.
Baltor: (after Icy, Darcy, and Stormy insult him) I am Baltor, I am the greatest wizard in the magical universe! Do not dare challenge me!
Icy: (after seeing Baltor in his demon form) Whoa, did you see that?
Stormy: Yeah, ugly!
Darcy: And to think we were crushing on him.
Baltor: Looking for me?
Bloom: Yes, and there's gonna be no mercy!
Baltor: Agree, no mercy!
Baltor: Fairy dust can't stop me. I'm not a dark spell and neither are the water stars!
Baltor: The water stars are painful, aren't they, Bloom?
Icy: What's going on here?
Darcy: It looks like monkey in the middle.
Icy: And Baltor's the monkey.
The episode's title refers to, according to Baltor, is the most powerful spell in existence - that being to unleash the four elements of fire, earth, water and air on the world.