The soft clay mining site are a collection of six soft clay rocks that players can extract soft clay from at the Ithell Clan district in Prifddinas after completion of Plague's End. Soft clay is used to make pottery including experience urns.
While the Voice of Seren is active in the Ithell district, the soft clay rocks will not deplete. Mining soft clay with a bracelet of clay yields two soft clay per batch. One charge is still used per batch, and the experience is not doubled.
While a clay rock only requires 1 Mining, Plague's End is required to access this mining site, which has a prerequisite requirement of level 75.
The rock mass that surrounds the six individual soft clay rocks does not have an examine text, but individually they all have the examine text: "This rock contains soft clay."