I don't know.
Only, do you remember the little animals that would run around the collar of your robes, and a lot of girls had them at the beginning of school?
They were called robe pets, and they were nice but the spells would wear off eventually?
Maybe I would like to make something like that, only bigger and it wouldn't live on your robes, but follow you around, and the spell wouldn't ever wear off, or at least not for a long time.

From,
Hydra