Aboleth

Aboleth

Size: 20 ft
Weight: 6,500 lbs

Strength: Far beyond human limits, but average for their size
Agility: Average
Health: Very good
Intelligence: Superhuman
Willpower: Very good

Skills: Extremely knowledgeable in most fields, including information thought lost to time

Typically, creatures with innately mutagenic properties are known for these properties first and foremost, such as with lycanthropes. We have something of an exception here. While the mere touch of an aboleth can cause an undesirable and long-term transformation, their psionic abilities are much more fearful.

-Elric Hartson, monster researcher

An aboleth is a massive, vaguely piscine monster. Bearing three red red eyes aligned in a single column over a fanged maw, four lashing tentacles, and slimy skin, it is monstrous indeed! They are thankfully rare, residing almost solely in subterranean lakes and waterways deep below the planet's surface. While primarily aquatic, they can survive on land, though they move very slowly out of water. They are hermaphroditic, and effectively immortal, dying only to accident and injury. Frightfully, an aboleth's offspring inherits much knowledge from their parents at birth, making each individual a repository of ancient knowledge.

An aboleth produces two types of transformative substance. Firstly, it constantly secretes greasy cloud when underwater. It is short-lived, and rarely extends more than five to ten feet from its body. Mere physical contact with it, however, causes exposed creatures to gain the ability to breathe underwater, but lose the ability to breathe out of it. This effect lasts three to four hours, but the duration is refreshed by further exposure.

More frightening, the aboleth's tentacles secrete a mutagenic slime. Any creature touched by it finds their skin rapidly transformed, losing hair, scales, or any other covering as it is transformed into a transparent membrane over the course of one to five minutes. In addition to being unsightly, this membrane rapidly dries and cracks unless moisturized with fresh water.

An aboleth's most potent ability is its natural psionic power, with which it can create illusions of almost any nature within its vicinity. With greater effort, it can even supplant an intelligent creature's will with its own, effectively enslaving them utterly. This mental domination is absolute, but will break should the victim be more than a mile removed from their slimy master. Due to this ability, an aboleth usually has a host of devoted slaves, often comprised of amphibious humanoids.