We come a long way to what little remains of the Underworld and learn the ways of the Gargoyles.
Oh, and for those curious, here's what happens when you give the Storm Cloak to Homer:
Doing so earns you no physical reward, but you get a whopping 30 Karma. Not that you need it at this stage.
Honestly, if you're playing the game legit, you're probably better off just keeping the Cloak. It nullifies all magic when equipped - very useful against Daemons and Dragons!