Sentence:  X-Men: Apocalypse, directed by series <WSD>mainstay</WSD> Bryan Singer, gives Magneto, the Holocaust survivor who can control magnetic fields, and Xavier, the paraplegic telepath who tends to come off as really smug, next-to-zero shared screen time. 
Meaning of the word marked with <WSD> tags:  Someone or something that can be depended on to make a regular contribution.