TheBloodmoon

Blood Moon is a recurring night event. Every few nights the moon turns red and the sky shifts to a deep crimson glow through a custom shader, replacing the normal night sky. On these nights, hostile mobs such as zombies, skeletons, spiders and creepers flood the land, and how many appear varies with the biome they spawn in. Surviving a Blood Moon plays differently from getting through an ordinary night, since it changes how a player plans the day, where to build a shelter and which fights to pick.

An in-game settings screen, reached through a dedicated button, lets the spawn rate, the gap between Blood Moons and other values be changed to suit a given world. Editing config files and restarting the game are not needed. Players who want a milder version can set Blood Moons to happen monthly with weaker buffs. Installation needs NeoForge, and the mod runs on client and server, so the server and every player need it. Files are published for NeoForge for 26.1.2 under the MIT License, and the code is not open source.