Aggie's final spell at the end...here's what it is
I don't have it transcribed yet, but what others have said in another post here is correct: The spell that Kal reads, and which we briefly get to see when he opens the book, is what Aggie is reading again at the end when she turns the humans back into their normal selves...Aggie is reading the spell in reverse, just as they say throughout the movie about "saying a spell backwards to undo it". Debbie Reynolds' voice was recorded saying the spell normally, then the audio was played in reverse for the final scene as it was filmed.
This was interesting to figure out...I pulled the sound of that scene off the DVD, then reversed the audio to hear what she was saying.