Disaster / Destruction
The Twisted Rune kidnap Halaster Blackcloak to obtain the secrets of Gate construction. Portals from the undermountain allow all manner of creatures to escape, causing widespread destruction.
At dawn on Higharvestide of 1369 DR, two members of The Twisted Rune managed to kidnap Halaster Blackcloak from inside Undermountain. The lich Priamon "Frostrune" Rakesk and the alhoon Ralayan the Occultacle used a ring of multiple wishes to bind and summon the Mad Mage to Stardock, where they intended to probe the great archmage's mind for his intricate knowledge of portals and magical gates. Because Halaster was the eye of the storm that was Undermountain, his kidnapping allowed the madness of the dungeon to escape. Gates began randomly transporting creatures from Undermountain to places throughout the Realms, causing havoc and destruction everywhere. Among the many events, fire salamanders destroyed parts of Luskan, a gorgimera and manticores attacked Shadowdale, a legion of gargoyles laid siege to Suzail, and a juggernaut formed from shipwrecks flattened the pirates' Port Skaug. But by far the greatest amount of mayhem spilled out into the city of Waterdeep itself. A group of adventures hired by the Lords of Waterdeep managed to reach Stardock and free Halaster. The Mad Mage immediately returned to Undermountain, which quelled the chaos of the dungeon and ended the terror of Halaster's Higharvestide within hours, but Ralayan and Frostrune escaped before Halaster's rescuers could attack them.