When did the Borg develop rust?

You're looking at Whitechapel's album cover for their new album, A New Era of Corruption. Apart from looking like leftover Star Trek villains, Id love to know what the lead robot is holding. Human heart? Bloody appendage? Cherry tart? I bet it's a cherry tart, lucky rusty bucket of bolts. :(

Honestly, Whitechapel know how to do their metal, and I'll bet New Era of Corruption delivers big. Look for it on June 8th.