Bonecrushing Hammer +2

Default Bonus: 

This weapon’s die type improves by one step when dealing damage to skeletons and any other creatures that are composed entirely or mostly of bare bones (liches, particularly worm-eaten wights, animated skulls, bone golems and the like). So, if a warhammer normally does d8 damage per level in your hands, it does d10 damage per level against bony foes.

Grimmer than a depressed dwarven gravedigger in the rain.