Halaster Blackcloak

Medium humanoid (human), chaotic evil
Armor Class 14 (17 with mage armor)
Hit Points 246 (29d8 + 116)
Speed 30 ft.
STR
10 (+0)
DEX
18 (+4)
CON
18 (+4)
INT
24 (+7)
WIS
18 (+4)
CHA
18 (+4)
Saving Throws Int +14, Wis +11
Skills Arcana +21, History +21, Perception +11
Damage Resistances fire and lightning (granted by the blast scepter)
Senses darkvision 120 ft., passive Perception 21
Languages Abyssal, Celestial, Common, Draconic, Dwarvish, Elvish, Infernal, Undercommon
Challenge 23 (50000 XP)
Special Equipment.
Arcane Recovery (1/ Day).
Legendary Resistance (3/Day).
Rejuvenation.
Spellcasting.
ACTIONS
Blast Scepter.
LEGENDARY ACTIONS
Cast Spell.
Spell Ward (Costs 2 Actions).

This full creature's stat block is not available (not OGL).

Halaster, the Mad Mage of Undermountain, is the deranged individual behind most of the traps and horrors found in the great dungeon under Waterdeep.
Adventures (Dungeon of the Mad Mage)