Thor : Ragnarok / Thor with the Obedience Disk

Thor suffering from heartburn in Thor : Ragnarok. Maybe it's because of Valkyrie bad alcohol? Or something he eat in the cafeteria with fellow gladiators? Who knows? Or it could be some concept about the Obedience disk that Valkyrie putted on Thor neck. And then the GrandMaster having fun with this device.
I've focused on the light effects and also on the skin in all my proposals.