Mute, Damaged, and Insecure (Klance Zombie Apocalypse AU)

Whatever shows up in my head. It's gonna be interesting. I don't really know what to put warnings on, but there will be blood, bad language and le gays.

Dear Human, Welcome to the zombie apocalypse, the brightest side of Hell! Caused by evil masterminds and tainted treats, we strive to exterminate your species in the most gruesome ways we can think of! Sincerely, Emperor Zarkon

Keith escapes, Lance saves him, that's all I got so far.