Complex sentence: Greendog is a cool California surfer that decides to wear a cursed pendant he finds on the beach, only to learn that it will not come off, dooms the wear to be attacked by animals and prohibits surfing.
Split into simpler sentences: Greendog is a cool California surfer that decides to wear a cursed pendant he finds on the beach. However, the pendant will not come off, dooms the wearer to be attacked by animals and prohibits surfing.