Take a detour down the bridge before High Lord Wolnir to enter the Smouldering Lake, and head left to where a Giant Sand Wurm has made its home. The Shield of Want is a special magical shield that allows you to obtain more souls from enemies, much like the Covetous Silver Serpent Ring - though it's located about halfway through the game.
At the roof of the shrine, look for an open window along the far wall you can jump into that leads to the Old Cell where the ring is located. First you must find the Old Cell Key in a chest in the sewers beyond the Giant's Cell, then head into the Profaned Capital before doubling back to the dungeon through a side passage until you come to a large shrine amid a poisonous lake. This ring can be found deep in Irithyll Dungeon, in a cell with a window looking into the Giant's cell. Skip the Key - Find out how to glitch onto roof of Firelink Shrine
