Incorrectly regarded as goof: It's established angels are impervious to things which would harm humans, while Lucifer is only vulnerable to those things when Chloe is near. However, Lucifer has stated that angels (including himself) can harm each other, and both angels and demons are shown being able to hurt each other throughout the series. Maze is able to beat up Lucifer in Chloe's absence because Maze is a demon.