Games : What item is sold whenever I step on the top left sell shop panel in Crypt of the Necrodancer?

There is a special shop that allows you to sell items that you have equipped for gold. I can understand all but one of the panels.

• North East: Ring


• East: Digging Tool


• South East: Weapon


• South: Torch


• South West: Boots


• West: Torso


• North West: ???

What is the North West panel supposed to be and what item will it sell?