Metoid

Metoid is Metoid. Metoid is glowin flyin jellyfish thingy. Metoids are incredibly ravenous and are constantly seeking to S U C C people's life. Kind of like a lawyer. But squishier. And Deadlier.

Physiology
The body mostly consists of a thicc, round, translucent membrane resembling a jellyfish's hood, typically ranging in color from green to blue. Within this membrane are four red, spherical organs resembling testicles, closely arranged so only three are visible from most angles. Many neuron-like connections grow out of these testicles, branching throughout the Metoid's upper body.

The Metoid's leech-like maw lies beneath the membrane, and features two pairs of mandibles: the larger pair for gripping their prey, and the smaller for siphoning out its life energy. The aforementioned maw is likely used in conjunction with the large fangs to strengthen their hold on prey, to perform le S U C C.

The Legendary S U C C
The Metoid is fabled for It's legendary ability to S U C C. When a Metoid S U C Cs, it drains you of your will to live. Mother Brain wants to weaponize le S U C C. Nobody knows how he do dat, but they do know he still can S U C C.