seems pretty simple. Since he can't see you when you're under the blanket, get out of the bed with the blanket wrapped/taped around you. keep U.B near, order a big blanket on amazon, get food from the kitchen while occasionally breathing, then wait in the bathroom on the toilet with U.B and cat food while you wait for the blanket to arrive. Then, put on that blanket and chuck the first one at the monster. It probably can't see anything, as its eyes are covered by the blanket.