Rubar Imperior's Reanimation Ability's Details
Rubar supplies the corpse with life while draining his own energy to feed the corpse. This would keep going until Rubar stops the ability and by doing that kills the corpse. That or Rubar dies himself due to lack of energy. (The corpse would drain all Rubar's Energy and in doing so would kill him.)
Whatever state the corpse is in will be static. If he uses his ability on a freshly killed person, no problem. But if they started decaying, they would need their organs replaced before the ritual otherwise the revived corpse wouldn't be able to function. Dying again.
If Rubar revives a skeleton, they're not going to say much.