Complex sentence: So Hades gives Jafar a new snake staff, which makes him flesh and blood so long as he holds it, and tells him to attack Hercules while he's training on Philoctetes's island.
Split into simpler sentences: So Hades gives Jafar a new snake staff, which turns him into a mortal. Then, he orders Jafar to attack Hercules while he's training on Philoctetes's island.