Braindeath's mark is an item from the Rocking Out quest. It is one of the five marks needed for the quest, in order to make Young Ralph talk about Rabid Jack.
It is given by Captain Braindeath after the players get an order from The Rusty Anchor Inn for his 'rum'.
If dropped, talk to Captain Braindeath to get another:
- Player: I lost the mark.
- Captain Braindeath: Is this some game to ye? There, and don't lose this one!