Complex sentence: While in the Other Realm, Jameson possessed both his human intellect and the Man-Wolf's body, as well as vast superhuman strength, a high degree of durability, and cosmic and telepathic powers, the full extent of which is yet unrevealed.
Split into simpler sentences: While in the Other Realm, Jameson possessed both his human intellect and the Man-Wolf's body, as well as vast superhuman strength, a high degree of durability, and telepathic powers. He has cosmic powers, the full extent of which is yet unrevealed.