Arlemite is the second rarest or in the overworld. It is obtained by mining it, although this is a very hard way to get it, or it is rarly dropped by Corrupted Dramycrx, but it does drop multiple Arlemite when it does. This is used to make arlemite armour, tools and weapons. It can also be used to make an arlemite shickaxe which  is an alround tool but is not infinite.