Your brother has betrayed you in the worst way possible?
-Should you get revenge from your brother and betray all you once believed in
-or should you die and elt your brother keep your possetions, your throne, your glory?
A cave with weapons sunken into the walls, blades sticking out of the floor and ceiling, and so on. Possibly, any weapon used in it could be torn out of the hand and sink into the stone.