The strange egg that that was guarded by a spook, taken by Boney Lizzy and then taken away by skelts, was that the egg that Talkus hatched from, and what would have happened if Lizzies attempt to get the eggs power worked?
Well spotted! Yes Talkus hatched from that egg! I think If Lizzie had used the egg she would have become the slave of Tallkus. Alice too would have been in danger.