The Horn of Rohan
A simple wind instrument made from brass. If used by inexperienced
musicians it sounds like somebody making "prbbt!" noises down a drainpipe.
A horn carved from the bones of the Dragon of Ered-Mithrin, this heirloom
of the House of Eorl bestows to its user the gifts of courage and command.
It can be activated for heroism, berserker, and haste every 250 turns
if it is being worn. It increases your wisdom and charisma by 2. It
allows you to sense the presence of dragons. It cannot be harmed by
acid, cold, lightning or fire.
Level 14, Rarity 10, 1.5 lbs, 80000 Gold

(T.o.M.E. 2.3.5)