Crimson Nylium is a type of block found in the Nether dimension of the game Minecraft. It has a vibrant red color and is primarily used to grow Crimson Fungi and Warped Fungi. Players can also use it to create Crimson Roots and Weeping Vines. This block generates in the Crimson Forest biome, which is characterized by its unique vegetation and terrain. Crimson Nylium can be mined with any tool, but using a hoe is the most efficient method. It also has a unique property of spreading to adjacent dirt or grass blocks when placed in the Overworld.