Slice open door 18 for the Imbrued Thorns of Sin.

A long lost sword and suit of plate worn by penitent Knights of the Two Headed-Basilisks. Decorated with thorns, inside and out. A century of sinners' blood corrupted the sword and plate, which now thirsts heavily for it. It roams the ruins of the dying world with a body formed of the blood of all the sinners who have worn it. It wishes to be defeated and worn. It craves the blood of heretics.