Level 2 Wrecker (Humanoid)
Bloody Hammer +10 vs AC - 7 damage
Natural Even Miss (Battered and Bruised) - 3 damage
Bloodlust - Deal an additional 2 damage against enemies who are staggered or taking ongoing damage
Unstoppable Rage - When the Duergar Berserker is dropped to 0 HP, it can make an atttack as a free action before dying. If the Berserker is not engaged when dropped to 0 HP, it may also make a single move action before attacking.
PD 14 HP 40
Creator's Note: My interpretation of Duergar for my campaign means that these are more or less evil Dwarves, not a separate race, and have been designed accordingly.