Slate


 * Not to be confused with the Series:.

are NaN Items in.

Location and Uses
The four NaN Slates are found in the OoA:. Within the OoA:, there is a room with a giant stone tablet sitting on a pedestal, with receptacles for the slates surrounding it. When all four are placed into their receptacles, the larger stone tablet will part, exposing the staircase that leads to the OoA:'s OoA:, OoA:.