This mod adds various mystical stones that allow you to transform items into others (related to the stone element). You can also create mob spawns and special items. The mod is complete, but it's missing: Textures, special items (I'm already working on them, and some will be released in future updates), Possible enchantments, items, and special ores. (I'm not working on these because I'll finish the special items and textures first and then think about new additions.)
These three things will be released in future updates and divided into parts, so don't expect the mod to be complete in the next update.