Nautilium

Shulker shells will no longer be useless material in Minecraft: instead you'll be able to use the item for armor crafting. However, to do this you'll need to use the Nautilium mod to add the appropriate functions to the game. Head to the ocean depths to obtain the material. Then you can craft the Shell. Next you need to get an Ancient Shard. Ancient Shard in a Furnace becomes Nautilium Ingot. After that you can create two types of Armor.