Creapy! Try going in with no armor.
"Only what you bring with you."
I mean, if something comes out and kills you, I'm sorry, but this theory makes sense.
Anyways! Please, keep this thread updated! I want to ear what's in there! And good luck!
Personal reward theory: Black-purple PVE crystal, like the black-orange PVE crystal from EC, (TFB's prequel) and both are sold as PvP versions.
I would LOVE a pet from the Hypergate... Strange monster thing. Or a baby final boss!
Odds are its a pet or crystal. This is Star Wars, think lore... Something that has to do with the op, and the dread masters...
Good luck friend, may the force be with you.