From this page you can find all awesome stuff that you can create with COW CUBE. You can find this item in signs category. Using growspray would be madness, better get a time machine. Is this farmable? Good leveling up material if the answer is yes. Currently we do not yet have knowledge about the durability of COW CUBE. There is no data about seedratio. There is no data about gemratio. Oops, there is no entry in the database about blockratio. If you know something, please share.