Ulyaoth

Ulyaoth is one of four mysterious entities known as "Ancients", which serve as the primary antagonists in the video game Eternal Darkness: Sanity's Requiem. The Ancients predate humanity. The exact origins of the "Ancients" is unknown, but it is known that they are exceedingly powerful, and, after being sealed away in another dimension of eons, now intend to return to Earth, destroy humanity and the other "Ancients", and take the Earth for themselves and their "Guardians", creatures that serve them. Ulyaoth looks like a giant jelly fish with a blue tinge (his "Guardians" are also all blue in color). Ulyaoth's attacks consist mainly of creating portals, which he can use to both to reflect enemy attacks back at them, and to sever body parts by creating portal around a target's limb, for instance, then teleport to limb away, effectively severing it.