[NTJedi]

Lets not forget ritual of rebirth... if a prophet is in the hall of fame and dies then the prophet can return with ritual of rebirth.
Now unless its changed with Dominions_3... this mummy can not only do reanimation but has the previous priest levels of your prophet without being your prophet.
Now for the extra bonus... which is you can make him your prophet again and raise the priest level even higher... providing you the ability to reanimate Longdead Horsemen!