Mothlight

In misty bogs and hazy swamps lie a cousin to the will o wisp, the mothlight. The mothlight is a glowing diaphanous orb of smokey light with gossamer tendrils that trail behind it as it dances in the moonlight. To many, they look like the colored blobs that appear when you close your eyes. Mothlights sway and flash hues of orange and blue to fascinate and entrance mortals that happen upon them. Despite their alien beauty, mothlights are existential predators. When a mortal gets too close to it, the mothlight drapes its tendrils around the creature and feeds on its thoughts and psychic energy. Mothlights will gorge on a creature's mental energy until it becomes braindead. The mothlight will then bloom and release smaller glowing polyps that will eventually move on and grow into full mothlights of their own.

Despite popular belief, the mothlight is not a creature, but mere a shadow of a creature from a higher dimension. Because our minds are three dimensional, we simply cannot fathom its true form, so we can only see the glowing shadow when it bleeds into our world. While in its dimension it is considered a mere animal, in our world the mothlight creature has a keen intellect that rivals most mortals. The creature will come into our realm through thin films between our world and the higher world, swimming through angles and hovering about through nature. It can't move much in our dimension, or perhaps it simply prefers to wait in ambush away from cities. Its shadow, the mothlight, attracts mortals through means unknown, where it can devour our thoughts. After you've seen the shadow, it's generally too late to run away. Even closing your eyes fail, as your own phosphenes betray you and guide you closer to the mothlight.

By Alexander Semenov

The only known way to escape the fascination effect is through over stimulation of your other senses. When going into an area infested with mothlights, it is best to bring smelling salts, gunpowder, or anything that can make loud noises or strong smells. Flash paper is also a good idea but rare and blinds you, which may not be preferable. After using any of those, run away. Only those with an intimate knowledge of higher order mathematics and physics can hope to kill the creature. Even third dimensional magic can't work. Only by mapping out the location with advances equations, or opening your mind to the higher dimensions through meditation, hallucinogens, and astral projection can give you a chance at attacking the creature. But that's a post for another time.

Mothlight:

Phototaxi: Make a Magic saving throw. On a failure, you must do a full movement towards the mothlight. You can do a single action if you succeed on another Magic saving throw. When you reach the tendrils, each turn you lose 1d6 intelligence. When you reach 0 INT, you become brain dead.

I like jellyfish. This also makes the third monster I've made inspired by the way a Pokemon looks.

The first two being Nincada and Mimikkyu