The Lightning Crown is inextricably associated with the Storm King. Previously thought to be a metaphor for the kingship, it was seen on the head of the Storm King when he rose from his grave ✣ . It was with him throughout his final battle. When he fell ✣ it was claimed ✣ by one of his heirs.
Whether this new "king" will keep ✣ it is another matter, but it has been legitimately and traditionally claimed by royal custom, ✣ at least according to the claimant.