Doomplate is a piece enchanted plate mail +3. It provides an armor class of 0 and +3 protection against slashing weapons, as any normal set of plate mail. It has a weight of 27 lbs. Despite the name and the in-game description which might suggest the armor is cursed, this is not the case. This item appears in Baldur's Gate II: Shadows of Amn. It's gained as a reward from the genie in the Asylum Gauntlet, after finding the three gems and defeating the monsters which come out of the portal.
Named by Adarius Shin, the Doomplate is deserving of its foreboding title. He had hoped to strike fear in his enemies, but Adarius set a grim precedent when he mysteriously died soon after donning the suit, just as every adventurer who has worn it since has done. It might be said, however, that most adventurers die in their armor and are not known for their longevity.