Complex sentence: Though Spider-Man survives (having only been drugged), Kraven is satisfied with his success, and after helping Spider-Man defeat the rat-like monster Vermin, and having no further goals, commits suicide.
Split into simpler sentences: Though Spider-Man survives (having only been drugged), Kraven is satisfied with his success. After helping Spider-Man defeat the rat-like monster Vermin, and having no further goals, Kraven commits suicide.