Grell are fearsome alien predators who exist only to devour other living beings. These aberrations divide all creatures into two categories, the eaters and the eaten, and humans fall into the latter. Grell resemble a bloated flying jellyfish. Their gray-green mass is covered in folds and wrinkles and appears like nothing so much as an enormous brain with a hard bony beak. The creatures have no eyes, instead perceiving the world by receiving sound waves and electrical impulses through their skin, which functions as a single huge ear. A grell is immune to gaze attacks, visual effects, illusions, and other attack forms that rely on sight. A grell’s body is naturally buoyant. This buoyancy allows it to fly at a speed of 30 feet. This buoyancy also grants it a permanent feather fall effect (as the spell) with personal range.A grell has ten pink or purple prehensile tentacles with retractable barbs that inject a paralytic toxin. Sages hypothesize that the creatures spread from world to world by planar travel, either through magical portals or the Vale of Shadows. Grell have no ambitions of conquest or slavery, desiring only food, making a grell a purely local problem, but left unchecked it can represent a plague of predation capable of depopulating an entire area. Instinct: Devour humans