This map requires the no_moon.skyblock Modpack, or the Corpse of the Broken Moon Modpack.
no_moon.skyblock is a classic skyblock survival, with a horror mod twist, instead of being in a blank void with a handful of islands, those islands are located in the center of a forgotten forever world. One that's being consumed by the corruption blocks of no_moon.jar
Video Showcase (will skip to the timestamp of the showcase):
