Minecraft wiki entry for Sculk, associated text: "While not related, Sculk name was inspired by Jeb's process with naming the Shulkers - he liked the word "Lurker", but changed it around a bit to feel new. Sculk is one letter changed in Skulk, meaning 'keep out of sight, typically with a sinister or cowardly motive'" – @kingbdogz on Twitter, October 13, 2020