All the ores are chests in this plugin. All you need to do is put this into your server and enjoy with your friends. As you get better ores, you get better and over-powered loots. Click here for a reference (I am not the creator of the plugin used in the video but made it quite similar). There is also a possibility that you are spawned with SUPER ORES which gives you the best loot you could ever imagine. Please download the resource pack from this link.