A new lock screen theme by the name of LS Cinereal Dark has been released for iPhone 4/4S/5 and the fourth- and fifth-generation iPod touch running up to iOS 6.1.2. The theme was designed by deviantART user LolCakeLazors, in collaboration with Ymme1st, as a darker version of LS Cinereal Light.
Both lock screen themes feature a minimalistic design and transparent status bar. LS Cinereal Dark has been submitted to Cydia for approval, available for download on deviantART in the meantime, while LS Cinereal Light can be found under the ModMyi repository. Both themes are free.