Krotan's Skullcrusher

Krotan's Skullcrusher, also named Mace +2, is an enchanted weapon. When this weapon is compared to a standard mace it does +2 more damage and has a +2 thaco bonus. It's speed factor is 5, making it two points faster. The mace has a weight of 7 lbs, making it 3 lbs lighter than a normal mace. This is the most powerful mace that is available in the game of Baldur's Gate and is found in Durlag's Tower at the last floor before the demonknight in the area with the deadly floor trap.

In-game description
"Mace +2: 'Krotan's Skullcrusher.' Even the hordes have their heroes, and while they are vilified in civilized company, their deeds are sometimes impressive nonetheless.Krotan was an expectionally intelligent orc, as far as orcs go, who commanded an ever-shifting legion of ogres, orcs, hobgoblins, and other assorted beasties during the Year of the Lost Lady, 1241 DR. It was in this tear that a group of bandit orcs allegdly kidnapped and killed a Tethyrian noblewoman, and the response from authorities was genocidal slaughter of orcs throughout the south in her memory. Krotan mounted a defense that ensured his people were not entirely destroyed; though they were displaced. Krotan himself fell near the end of the conflict, and his head was mounted outside the graveyard where the young lady was buried. As a point of interest, orc's called this time the "Year of Pushing Too Far.""