Panthro , along with his friend , Grune , were originally sent by Claudus to find the Book of Omens .
Book of Omens ' attempted search resulted in Mumm - Ra 's release friend Grune betraying Panthro .
Panthro , along with his friend , Grune , were originally sent by Claudus to find the Book of Omens , but their attempted search resulted in Mumm - Ra 's release and Grune betraying Panthro .