Pirates: Start with an All-Powerful Hammer

Yunuo, a Buddhist otaku who travels through One Piece, starts out with a hammer and a furnace. After playing with iron for several years, he finally finds the true use of the hammer. What? Whitebeard is dying? Let me give you a hammer and you can resurrect with full health on the spot! What? Do you think knives are too rubbish? Let me give you a hammer and it will turn into a supremely sharp knife! What? Your wife is giving birth? Let me give you a blow to make sure it's a boy! Come over here and let me give it a try!