Crown of the Mountain

The Crown of the Mountain was an ancient stone circlet of unknown origin that possessed a number of magical properties, such as the ability to carve away stone and earth and protect its wearer from adverse weather and natural disasters.

Description
The crown was carved from rough, unpolished stone that was inlaid with a number of spikes.

Powers
It resized itself to fit the brow of whoever held it within their possession, or in the case of larger creatures, adjusted to the size of their wrist or tail.

The crown couldn't be destroyed by any known means. It was seemingly immune to all known spell effects including divinations and enchantments.

History
The exact origins of the Crown of the Mountain were unknown to the sages of Faerûn. Some believed it was gift from the Morndinsamman to the dwarves of Toril, while others believed it was a relic of the ancient Netherese arcanists.

The first verifiable appearance of the crown was confirmed in the private journal entries of three separate adventurers. The accounts spoke of a wizard named Larbrand from the "southern lands", a phrase that was was believed to refer to Halruaa or Zakhara, who bore the artifact in some quarry in Tashalar, in the Year of the Whipped Cur, 336 DR.

While little was known about the fate Larbrand, the whereabouts appeared again in the Year of Trials Arcane, 523 DR, as it was seen in the possession of the human merchant Urabbastrar Tholokh who was excavating large portions stone within the caverns of the Underdark beneath Chessenta. While the dwarven scouts who observed this horrifying use of the crown were prepared to steal the relic on the spot, and kill the merchant if necessary, they were preempted by a swarm of carrion crawlers who overran Urabbastrar and sent the dwarves fleeing. When the scouts returned the next day, there was no sign of the Crown of the Mountain.

The crown surfaced again nearly 300 years later, in the Year of Many Tears, 811 DR, within the possession of a Talosian priest in the Nelanther Isles. The priest was using the crown to hollow the earth beneath an island, the hopes of creating a citadel devoted to the Storm Lord.