Sat Oct 20 06:56:25 2018 at level 47 (148 hrs):
Zanitjah began the quest to become a Mummy <PK: 8-3>

Sat Oct 27 07:40:31 2018 at level 47 (169 hrs):
Zanitjah has been granted by Empire promotion <PK: 8-3>

Mon Nov 19 07:49:04 2018 at level 47 (229 hrs):
Gave all correct items to Conservator <PK: 17-7>

The chance is set when the quest begins, so if your spell mastery was junk when you made the trek down that would be a pretty hefty ding on your chances, as well as not having any leadership bonus hooked to it at the time.