SCP-3000 is a Thaumiel-class SCP entity that is considered highly dangerous and causes permanently lasting effects memtically, specifically to the brain, altering memories and dreams. It was believed by one of the researchers to be a primordial god, although he recanted the theory as he was being devoured by it. All that is known at the moment is that there is nothing repairable about the damage that is done by SCP-3000, and even being within nigh-proximity to it causes one to lose ALL memories. It's size is unknown, but its estimated to be roughly 900 km in length.
Powers and Stats
Tier: At least High 6-C, possibly higher
Name: SCP-3000, "Anantashesha"
Origin: SCP Foundation
Classification: Thaumiel-Class Anomalous Entity
Powers and Abilities: Superhuman Physical Characteristics, Animal Manipulation, Mind Manipulation, Dream Manipulation, Quasi-Possession (Steals memories from victims and inserts them into others, thus "possessing" them with the other victim), Telepathy, Resistance to typical capturing tactics, Mind Control, Poison Manipulation (It secretes poison as a by-product of its metabolism), Immortality (Type 1), Does not require sustenance to survive, Fear Manipulation, Darkness Manipulation (Excretes a constant cloud of liquid that causes visibility around it to appear dark, to the point where victims can't see it despite being right by it), possibly many more (It is relatively new, being made on the same day this page is being created; more lore is a very good possibility), Memory Manipulation
Speed: At least Massively Hypersonic+ (By right of sheer size; its body is nearly 1/40th of the equator of Earth; if compared to an Anaconda's speed while stalking prey, it would move at roughly Mach 1066 on land and Mach 1333 in water)
Lifting Strength: At least Class T+
Striking Strength: Class ZJ
Durability: Unknown, probably at least Large Island level, possibly higher (By right of sheer size)
Range: At least several kilometers via mind and dream manipulation and most other anomalous powers, at least one kilometer physically, probably far further
Standard Equipment: None
Weaknesses: It is tangled up in its own body to create a large landmass beneath the sea, although it can move several kilometers away just based on the raw size of it