Complex sentence: In one occasion, he succeeds in breaking his curse and regaining his human form, but upon returning to Koth, he realizes that all the things and people he cared about no longer existed, leaving Venturas without a purpose in life.
Split into simpler sentences: In one occasion, he succeeds in breaking his curse and regaining his human form. But upon returning to Koth, he realizes that all the things and people he cared about no longer existed, leaving Venturas without a purpose in life.