b'Ghaggurath \n'b'  Gargantuan   aberration ,  neutral evil  \n'b'  Armor Class  12  Hit Points  252 (24d10 + 120)  Speed  20 ft., climb 20 ft.\n'b' STATS STR: 19 (+4) DEX:  14 (+2)  CON:  20 (+5)  INT:  16 (+3)  WIS:  30 (+10)  CHA:  25 (+7)  \n'b'\n'b'\n'b'\n'b'\n'b'\n'b'\n'b'  Saving Throws   Con  +11,  Wis  +16,  Cha  +13  Skills   Arcana  +9,  Insight  +16,  Nature  +9,  Perception  +16,  Persuasion  +13  Damage Resistances  acid, cold, fire, thunder; bludgeoning, piercing and slashing damage from non-magical attacks  Condition Immunities   charmed ,  grappled ,  prone   Senses   darkvision  120 ft., passive  Perception  26  Languages  Abyssal, Common, Giant,  Goblin , Infernal, Terran, Undercommon; telepathy 100 ft.  Challenge  18 (20,000 XP) \n'b' SPECIAL TRAITS \n'b'\n'b'  Aberrant Ground . The ghaggurath in a 10-foot radius around the mouther is doughlike  difficult terrain . Each creature that starts its turn in that area must succeed on a DC 19  Strength  saving throw or have its speed reduced to 0 until the start of its next turn. \n'b'  Create Thrall . A victim whose  Wisdom  score is reduced to 0 from the ghaggurath\xe2\x80\x99s poison is automatically dominated (as a  dominate monster  spell). This effect lasts until the thrall worm is removed and at least 1 point of  Wisdom  is restored. The ghaggurath does not have to concentrate each day to maintain this effect, and a dominated creature does not receive a save to break the effect. If the ghaggurath is slain, any thrall under its command falls  unconscious  and remains so until the thrall worm is removed and at least 1 point of  Wisdom  is restored. \n'b'  Legendary Resistance (3/Day) . If the ghaggurath fails a saving throw, it can choose to succeed instead. \n'b'  Magic Resistance . The ghaggurath has advantage on saving throws against spells and other magical effects. \n'b'  Magic Weapons . Ghaggurath\xe2\x80\x99s weapon attacks are magical. \n'b'  Thrall Worm Poison . The target exposed to this poison must make a DC 19  Constitution  saving throw or become  poisoned  for 1 hour. While poisoned the target loses 1d6  Wisdom  points per round. The target may repeat the saving throw at the end of its turn. It takes two consecutive successful saving throws to end the poison effect. \n'b'\n'b' ACTIONS \n'b'\n'b'  Multiattack . The ghaggurath makes eight bite attacks \xe2\x80\x93 but no two attacks against the same target. It may replace up to 4 bite attacks with a Spit Thrall Worm  attack  instead. \n'b'  Bite .  Melee Spell Attack : +16 to hit, reach 20 ft., one creature.  Hit : 23 (3d8 + 10) piercing damage. If the target is Huge or smaller, it must succeed on a DC 18  Strength  saving throw or be forced  prone . If the target is killed by this damage, it is absorbed into the ghaggurath. The target is also exposed to Thrall Worm Poison. \n'b'  Spit Thrall Worm . The ghaggurath ejects a fleshy worm approximately 1 foot long, called a thrall worm, at a single target to a range of 50 feet. The worm hits and bites the target if it fails a DC 16  Dexterity  saving throw. When a thrall worm strikes a target, it quickly burrows into the target\xe2\x80\x99s body. This worm can safely be removed with a successful DC 25  Wisdom  ( Medicine ) or by the application of any healing or restoration spell; otherwise removing the worm deals an extra 1d6 points of damage to the target. After 1d4 rounds, the worm works its way so deep into the target\xe2\x80\x99s body that it can only be removed by cutting open the area (dealing 1d8 points of damage to the victim) before attempting a  Wisdom  ( Medicine ) or casting a  healing  spell. Once a worm is removed from its host, it dies. Any effect that removes disease destroys the worm. As long as a thrall worm remains inside a target, the target cannot heal the  Wisdom  damage dealt by the ghaggurath\xe2\x80\x99s poison. A creature can only ever have one thrall worm inside it at one time; it can however be attacked and bitten by multiple thrall worms.'