Countdown to Final Crisis #23

Countdown to Final Crisis — DC Comics

Issue: #23

The countdown continues with a new name and even bigger thrills! And Mister Mxyzptlk explains it all! Can Mxyzptlk survive the wraith of Superman Prime? Plus, more DC VILLAINS origin backup stories: The Origin of Mr. Mxyzptlk! by Scott Beatty and Kyle Baker.

First appearances: Annataz

Creators: Alex Sinclair, Paul Dini, Keith Giffen, Keith Giffen, Keith Giffen, Ken Lopez, Mike Carlin, Mike Carlin, Tom Derenick, Tom Derenick, J.G. Jones, Peter Pantazis, Kyle Baker, Elisabeth V. Gehrlein, Wayne Faucher, Scott Beatty

Characters: Mr. Mxyzptlk, Zatanna, Superboy Prime, Alex Luthor, Anti-Monitor, Ultraman, Mary Marvel, Sinestro, Cyborg Superman, Eclipso, Lord Havok, Annataz

Story arcs: Countdown to Final Crisis