Bone Fiend

Two varieties of Bone Fiends exist in the game. The first variety is encountered in Abazigal's Lair and is a form of demon. The second variety is found in the The Black Pits II: Gladiators of Thay and is an undead, skeleton golem. Both varieties are hasted, perform two attacks per round of 1d12 crushing damage.

Throne of Bhaal

 * A pair can be found in Abazigal's Lair. They are in the second room you enter after diving through the only pool you can initially enter.