Kirkhammer

thingiverse

Kirkhammer from Bloodborne is my go-to choice, although I haven't had a chance to try anything in the DLC yet. This massive replica stands life-sized, and inside its hollow core lies a carefully crafted space for a sword to be inserted. I opted not to include any locking mechanism, but the fit is snug enough that it should stay in place with just friction holding it together. Needless to say, this beast of a hammer is enormous, so you'll need to scale it down if you want to print it out. The sword inside requires support material for stability. On the other hand, the hammer itself can be printed without any supports – as long as it's placed upside down – except where it meets with the sword.