Jasper Robe

The Jasper Robe is an armor piece that goes in the chest plate slot. It is crafted using 10 Jasper, 1 Robe, 5 Fallen Stars, and 5 Meteorite Bars at a Loom only after Eater of Worlds or Brain of Cthulhu has been defeated. It increases maximum mana by 110 and reduces mana usage by 30%.