The Corrupt Stone is a 'monster drop' that was introduced during the Ratboy's Nightmare Update. It is one of the many collectibles that are needed by the players in order to complete the entries of the Itempedia of the Nightmare. The Corrupt Stone can be obtained as a possible drop from the Corrupted Gold Knight and/or the Corrupted Onyx Knight.
In appearance, the Corrupt Stone is composed of scraps and leftovers of corrupted metals stacked on top of each other. Besides that, not much can be said about its appearance.
The Corrupt Stone does not have any usages in-game that will benefit the players, other than to be sold to a selling vendor at a selling price of 5,000 gold.
- The Corrupt Stone is one of the first 'monster drops' that the players may acquire in their adventures through the Nightmare.