Knowledge Lord

This summonable boss is brought into the world with the Ancient Book. It drops a Vacuous Sword and Ancient Locket. It has a chance to drop Mending Books, Books, Lapis, and Experience Bottles. It has 350 Health, deals 12 Damage, and inflicts Blindness. While Ancient Lockets can be found in other ways, this is the best way to obtain them and advance in the game.