Dracorage mythal

The Dracorage mythal was a magical effect created at the end of the Time of Dragons by High mages of the Fair Folk. This High Magic effect tied a Faerûn-wide mythal to the King-Killer Star.

The Dracorage mythal encompassed roughly a area where the King-Killer Star was visible over Faerûn and caused all dragon and dragon-blooded creatures to slowly become more agitated and reckless, eventually becoming little more than raging beasts.

Capstone
The heart of the Rage lay within a structure of stone, raised magically, with barbicans, spires, and towers, the terrain around it littered with an incredible amount of dragon and avariel skeletons hidden in a rocky valley somewhere on the northernmost reaches of the Faerunian continent. As of 1373 DR, it was protected by six Tarterian dragons in service of Sammaster. Strange events littered the landscape. The valley was trapped, afflicting those who attempted to fly out of it with maze. There were also remains of a golem or earth elemental; the local flora included lichen, bistort, coltsfoot, and spadderdock. The location was so far north that the days were extremely short in comparison with the nights. The area was prowled by at least one ghost dragon.

Some parts of the place had other disturbing effects and a pocket of especially virulent pocket of enchantment lay somewhere. The corrupted enchantment in the valley, when it affected Taegan sufficiently, had a similar effect to the microcosm psionic power, creating for Taegan Nightwind the illusion he'd always just been a highborn rake in Lyrabar with an odd compulsion to climb and jump, which he barely managed to disbelieve in time to avoid hitting the ground after falling from flight due to the illusion.

The dracorage mythal itself was embodied in a room within the citadel, with a silver pentacle inlaid on the ground, with black walls and ceiling on which the night sky had been depicted with gemstones; a gigantic ruby traling carmelians stood in for the King-Killer Star. After Sammaster's meddling in 1373, a number of portals on the room's walls generated color flashes, which were visible from outside the room. The lich had also placed two guardians at the entrance of the room, an ironwyrm golem and a drakestone golem.

History
The first Rage of Dragons was in -25,000 DR. At a later date, the dragons retaliated, attacking the capstone en masse; the elves successfully defended the location, leaving the area littered with interminable skeletons millenia later, a large number of which were avariel.

Some years prior to, Sammaster reached the mythal's capstone through a portal hidden in the Novularond mountains. By Hammer 1 of that year he had altered it, using his own phylactery to bind the mythal itself to energies drawn from the Abyss, which would power it rather than the King-Killer Star: this way, he started a continuous Rage of Dragons.

Eventually, King Tamarand and the Talons of Justice broke into the heart of the Rage and slew the guardians. Though Sammaster fought them every step of the way, the mythal was finally broken by Pavel Shemov on Nightal 6 of that year, ending the Rages forevermore.