Goblins And Giants is a mod that adds a lot of new mobs and a dimension. It isn’t even nearly done yet right now, but there are already quite a lot of new mobs, items and blocks. The final plan is to have about 8 new dimensions where you need to collect a key from a very strong boss. When you have all of those keys you can get to the final boss. In every dimension there will be a lot of cool gear etc.