Thought Eater Slayer (Basic Lore)

Thought Eater Slayer (CR 13)
Pure Evil - Medium - Outsider
A Thought Eater is one of the oddest and most hated of all monsters. They appear out of nothing, surrounded by a wavy distortion in the air as if they are surrounded by massive heat-ripples (even though they are cold), and they hover a few feet above the ground. They appear emaciated, even skeletal, ribs and pelvis standing out against translucent ectoplasmic 'skin'. Their heads are ghastly, a large round skull with huge eye sockets that may or may not evidence eyes, and a vast jagged beak on the front. Their skeletal limbs are stunted, and they have a paddle-like tail and wide-flippered feet as if they are meant to swim. It is speculated they live in the Ether, and after sensing prey in the Prime they force their way into our world to feed. Their feeding is ghastly, as they create sucking vortexes that target spell casters and feed on their very minds, damaging their intellects, aura, and bodies in equal measure. Once they have fed upon a hapless caster enough, they will then switch their attacks around, leaving a ghastly mental numbness behind. Thought Eaters are well-suited to feed on spellcasters, as they have defenses against the effects of spells and even destroy a caster's ability with spells at the same time. If you are attacked by these awful things, stab them. Spells are of little use. 'Slayer' is a grimly accurate term when applied to this large and dangerous breed of Thought Eaters. Thought Slayers, as they are often called, are much more solid and fleshy in appearance than their lesser cousins, and they hit a lot harder with their beaks and flappers because of it. Even worse are their huge, awful eyes, which are filled with motes of weird un-light they can use to injure and befuddle their enemies, as if their mind-destroying vortexes weren't bad enough....