Cloaker

Cloakers were intelligent creatures that dwelt underground and resembled large flying manta rays when active. At rest, they looked like a black cloak, hence their name. Although they were usually found in a flock of twelve or fewer individuals, they were thought to have built the Underdark city Ikemmu

Cloakers often waited in ambush for their prey and generally attempted to engulf an opponent with their wings. They also had the ability to emit a subsonic moan which caused fear or nausea in opponents and could shift shadows to conceal themselves or create a mirror image.