Based on the filename you provided, this refers to the mod for Minecraft Fabric .
If you need exact features, I’d recommend opening the mod’s JAR file (with a tool like WinRAR or 7-Zip) and looking for a fabric.mod.json file — it will list the mod’s description, authors, and any mixins or config options. Alternatively, search for the mod’s page on CurseForge or Modrinth using the exact filename.
: The core function of the mod, which optimizes the speed, placement, or rendering of End Crystals to reduce "lag" or "delay" during combat. Mod : Indicates it is a modification for the game.