Glossaryck was bound to the magical book of spells.
But now it is destroyed and he was literally sent to a void realm.
Glossaryck said he wasnt dead but calling him that is quite rude, so im assuming hes now just without a home
The Book probably wasnt a prison, more like his castle and soon he will Move into Star's magical notebook she made during the Baby episode.>>93947043
Earth things are a bit different since they are of another Dimension.
Most creatures like Glossaryck and baby are mostly royal servants.
Kelly is a wild card though. i dont know if she resides in mewni or not