monster

Aboleth

CR 10

Large Aberration, Lawful Evil

Reveal Stat Block

Armor Class

Hit Points

150 (20d10 + 40)

Speed

10 ft., swim 40 ft.

str

dex

-1

con

int

wis

cha

Traits

Amphibious.The aboleth can breathe air and water.

Eldritch Restoration.If destroyed, the aboleth gains a new body in 5d10 days, reviving with all its Hit Points|XPHB in the Far Realm or another location chosen by the DM.

Legendary Resistance (3/Day, or 4/Day in Lair).If the aboleth fails a saving throw, it can choose to succeed instead.

Mucus Cloud.While underwater, the aboleth is surrounded by mucus. con 14, each creature in a 5-foot Emanation [Area of Effect]|XPHB|Emanation originating from the aboleth at the end of the aboleth's turn. The target is cursed. Until the curse ends, the target's skin becomes slimy, the target can breathe air and water, and it can't regain {@variantrule Hit Points|XPHB unless it is underwater. While the cursed creature is outside a body of water, the creature takes 6 (1d12) Acid damage at the end of every 10 minutes unless moisture is applied to its skin before those minutes have passed.

Probing Telepathy.If a creature the aboleth can see communicates telepathically with the aboleth, the aboleth learns the creature's greatest desires.

Actions

Multiattack.The aboleth makes two Tentacle attacks and uses either Consume Memories or Dominate Mind if available.

Tentacle.m 9, reach 15 ft. ({@damage 2d6 + 5) Bludgeoning damage. If the target is a Large or smaller creature, it has the Grappled|XPHB condition (escape 14) from one of four tentacles.

Consume Memories.int 16, one creature within 30 feet that is Charmed|XPHB or Grappled|XPHB by the aboleth. 10 ({@damage 3d6) Psychic damage. Half damage. {@actSaveSuccessOrFail The aboleth gains the target's memories if the target is a Humanoid and is reduced to 0 Hit Points|XPHB by this action.

Dominate Mind (2/Day).wis 16, one creature the aboleth can see within 30 feet. The target has the {@condition Charmed|XPHB condition until the aboleth dies or is on a different plane of existence from the target. While Charmed|XPHB, the target acts as an ally to the aboleth and is under its control while within 60 feet of it. In addition, the aboleth and the target can communicate telepathically with each other over any distance. The target repeats the save whenever it takes damage as well as after every 24 hours it spends at least 1 mile away from the aboleth, ending the effect on itself on a success.

Legendary Actions.The creature can take 3 legendary actions...

Lash.The aboleth makes one Tentacle attack.

Psychic Drain.If the aboleth has at least one creature Charmed|XPHB or Grappled|XPHB, it uses Consume Memories and regains 5 (1d10) Hit Points|XPHB.

Aboleth

Ageless Alien Mastermind

In aquatic abysses, aboleths dream of dead empires and orchestrate plots that unfold across ages. These elusive, amphibious immortals physically and mentally overwhelm their victims and transform creatures with a slimy, aberrant infection, reshaping other beings to serve them beneath the waves.

Aboleths possess terrifying intellects and have alien mindsets. These creatures possess perfect memories of proto-worlds and incomprehensible dominions from the multiverse's earliest eons. Their secrets are innumerable and unfathomable. Aboleths lurk in places awash in primordial mysteries: the ruins of aquatic empires, hidden magical nexuses, or weak places between planes of existence. In these lairs, aboleths dream of epochs past, collect throngs of psychically dominated servants, consume the minds of unwitting victims, and prepare for their return to power.

Aboleths' alien goals and methods are often mysterious to other creatures. Roll on or choose a result from the Aboleth Schemes table to inspire an aboleth's schemes.

The lies we call reason are fragile things, vulnerable and raw on the shores of eons. But in the dream-vaults of dread ancients roil seas of terrifying truth. Our age is an island, and the ebb of primordial tides avows the Stygian wave.

Aboleth Lairs

Aboleths usually dwell in submerged ruins and caverns. They keep air-filled spaces for their terrestrial servants and to hold treasures that would be damaged by water.