Huge Titanium Breastplate
From World of Dread Database
For the Huge Titanium Breastplate you have to kill the Armored Beast. After obtaining the object to use must be transmuted into the chest of Transmutation, located on the first level of Hythloth. To transmute you will need one Shrink Potion and Huge Titanium Breastplate. Once Transmuted you will obtain a Heavy Breastplate Titanium, which gives the wearer -5 in strength. This object is used to bring up your strength by debuffing it.