This mod adds things related to copper. For example, copper can be used to make orange dye. Also added 2 villagers and 3 new mobs. Alchemist and miner, you can exchange and buy many items from them. You can find mobs in dungeons, for example, the Mossy Golem and the Horn of the Age will appear in caves, it is not recommended to beat them, as they can fight back, they have very useful functionality, for example, carrying objects or protection from hostile mobs. The rusty golem is an old, forgotten version of the iron golem; it is rumored that these golems entered the cave by mistake, trying to get out they only went deeper, where they remained for many centuries. However, some golems were able to get to the surface and they are already waiting for you on the plains to fight you. But it is not recommended to approach them, otherwise it will impose a negative effect on you, which will ultimately kill you. Go into the dungeons and bring these mobs to the surface to get good protection from the evil mobs.
