This is a nicely 3d printed Monster Hunter Anvil inspired hammer. It is printed in PLA plastic in 5 simple pieces; the fully assembled hammer measures a length of 27 inches.
The secret to slay big monsters is having a big sword. So you can't go wrong with this Monster Hunter Carbite Sword.
If you're planning to take on some real monsters in your neighbourhood, you will need the right gear. This Odogaron suit from Monster Hunter World will set you on your way.