A Rock Mod

Craft 1 cobblestone into 9 rocks and vice versa. You can also throw the rocks. put one rock in the center and enchanted books all around to make enchanted rock. The enchanted rock can not be used to craft cobblestone. Enchanted rock instantly kills anything it hits when thrown and is unlimited. I am fine if you use this in anyway other than straight up copying it. This mod idea was from a friend but I made the mod.