Complex sentence: At first, he is only a savage beast, intent on destroying everything in his path, including Doc Ock and the S.H.I.E.L.D. Trainees, but the Green Goblin gradually begins to regain intelligence.
Split into simpler sentences: At first, he is only a savage beast, intent on destroying everything in his path, including Doc Ock and the S.H.I.E.L.D. Trainees. But the Green Goblin gradually begins to regain intelligence.