Pen'droth Admar (Warhammer +2)

This terrifying weapon continues to grow in power; the might of the demons and devils slain
by it are bottled inside. The size and weight of the hammer are now nearly 4 feet long and 100 lbs, respectively. It deals 3d6 additional fire and shadow damage to demons, devils, and celestials.
One might begin to ask...who was this hammer actually made for?