Disney Classics Werewolf

[Dexter the Dragoon]

There is nothing in the OP to suggest the fireball is reactionary. It reads to me as a specific power. 

Jafar is one of the greatest and most villainous sorcerers in the land. His powers will be deadly, ruthless, and are numerous. Aladdin should steer clear of his fireball…

powers thief should steer clear says to me that it's reactionary, if thief was to try steal from jafar, they would get a fireball in the face.

Would agree with this take myself. The wording emphasizes Aladdin starring clear of it so would be to do with Aladdin's role rather than Jafars in this part