A regime where the current ruler claims to be the reincarnation of one deceased, especially the ruler to precede him or her.
(See the definition and etiology of "Mausoleum" for further insight)
"Not since North Korean media declared Kim Jong-il to be the reincarnation of Kim Il Sung has there been such a blatant attempt to create a necrocracy, or perhaps mausolocracy, in which a living claimant assumes the fleshly mantle of the departed."