FusionDex

Umbgar shrouds itself in shadows during the daytime. At night, it sneaks up on people to stick its tongue out, make a noise, and vanish into the night.

Umbgar roams around at night, silent and unseen. If it encounters anyone, it will suddenly make its patterns glow, frightening them for its own amusement.

Deep in the night, your shadow cast by a streetlight may suddenly overtake you. Umbgar evolved from exposure to the moon's energy pulses.