Oghma Infinium (Oblivion)

Oghma Infinium is a powerful skill book which is the reward for completing Hermaeus Mora's, quest. He will only give it to the one who has completed all the other Daedric quests in Cyrodiil. One must then capture a soul from each of the ten races of Cyrodiil with a special spell and gem and bring it to here. The one who does this is then given the artifact which will raise some of his abilities.