The Witches1990

Grand High Witch:
Formula 86: My greatest triumph. A work of... genius. Formula 86! In this bottle, 500 doses, with a delay mechanism that prevents it from working until two hours after it has been taken. [laughs]

Millie:
What does it do... Genius One?

Grand High Witch:
One dose, and the time works to the second. But more than five doses breaks the delay barrier, and the formula works instantly. Child... starts to shrink. The child... starts to... grow fur. Starts... growing a tail! All this happens in precisely twenty-five seconds! Shrinking more... child is no longer a child. [chuckles] Child... is a MOUSE!