Dweomercore

Dweomercore was an arcane academy that comprised the 9 level of the subterranean dungeon-complex known as Undermountain. Founded by the "Mad Mage" Halaster Blackcloak himself, it attracted malevolent mages who sought magical knowledge and opportunities to educate their pupils in the Art.

As of the Year of the Three Ships Sailing, 1492 DR, Dweomercore was overseen by an anonymous arcanaloth who served as the academy's headmaster, who in turn was aided by the night hag Wormriddle.

Description
Built from the remnants of a former underground mansion, Dweomercore had all the trappings that would be expected of any academy dedicated to the practice of arcane magic. It was well furnished, and featured a number grand lecture halls, workshops dedicated to the art of potion-brewing and spellcasting, an expansive library and dedicated classrooms for focused study on each of the schools of magic.

Entrances
Only one entrance to Dweomercore was commonly known:
 * A passageway from Slitherswamp led directly to the entry hall of Dweomercore.

Notable Locations

 * Classrooms:


 * Detention hall:


 * Dining hall and kitchen:


 * Dormitories:


 * Halaster's sanctuary:


 * Headmaster's sanctum:


 * Lecture hall:


 * Spellcasting hall:


 * Wormriddle's sanctum:

Exits
The following ways could be used to leave Dweomercore:
 * A pit in the middle of the academy dropped straight down to Muiral's Gauntlet.
 * An archgate located near the conjuration classroom opened up a portal to the domain known as Arcturiadoom.
 * South of Halaster's chamber was a secret door that opened up into a corridor that descended to Muiral's Gauntlet.

Inhabitants

 * Arcanaloth: An ally of the Mad Mage, it employed nycaloths and mezzoloths, and granted safe passage in exchange for magic items or assassination of the rampaging bone devil.
 * Wormriddle: Proud commander of four flesh golems, she was ready to offer spells in exchange for souls and wore a mummified kitten's head, because of her fear of felines, from cats to Tabaxi.

Students

 * Spite Harrowdale, a Rashemi human archmage in the guise of a twelve-year old boy, with an oni companion.
 * Cephalossk, a lonely mind flayer arcanist with a hatred for Spite Harrowdale.
 * Nylas Jowd, a Thayan mage already enrolled in the Red Wizards of Thay, with two invisible will-o'-wisp companions.
 * The Horned Sisters, Turbulence and Violence, were tiefling mage sisters who tried to join the Arcane Brotherhood in Luskan and were denied. After staying in Skullport for a few years, they ended up here.
 * Elan Tanor'thal, a drow mage whose house ran a slave-trading business in Skullport but was driven out by the Xanathar's Thieves' Guild.