War Hammer

It looks like both a pickaxe and a mace. But its design comes from a classical cubic sledge hammer. I added pyramids with different angles for different penetration damages for different objects. Acutest angle has more penetration damage but it is more vulnerable for itself too. Widest angle pyramid on the top side of the hammer. And it is strengthening the hammer head structure at the same time.

"A war hammer is a late medieval weapon of war primarily used for close combat action, whose design resembles the hammer. Its appearance is similar to that of an ice axe. Originating in Europe and the Middle East in response to plate armour technology, it was later introduced to Mughal India." (Wiki)