Amazing Future Tales
A psivore invader resembles a dense gray, leathery lump of tissue and muscle roughly three or four feet in diameter. It undulates via flight through the vacuum of space as easily as it moves through an atmosphere. Its serrated beak is surrounded by a ring of fleshy growths that detect heat, electrical activity, and psychic energy. (Otherwise, a psivore invader is blind and deaf, and has no olfactory senses.)
Psivore invaders, as their name implies, feed on psychic energy, which they tear from psionic creatures by biting. This creature is particularly resistant to psychic effects.
Psivore invaders are completely immune to the hazards of outer space, such as the vacuum, cosmic radiation, et cetera. Extreme conditions, such as flying too close to a star, still prove disastrous to a psivore invader. A psivore invader can fly through outer space as if it were a drive-1 rated starship.