Minecraft wiki entry for Attribute, associated text: As stated before, a modifier's name can be anything, and this does not affect its behavior. The following are known modifier names and values used in vanilla Minecraft. Note that some UUIDs are generated on-the-fly, while others are represented as fixed strings in the code - these have been listed as well. Do not add UUIDs to this table for modifiers where they are not listed - if a UUID is not listed, this means that it is different every time the modifier is created.