This is the Channelled Nail from the videogame Hollow Knight!
The sword is pretty big, standing 1 meter tall! it is cut into smaller pieces and has a hole in the middle for putting a 1 inch dowel up to 430mm long inside of it.
Check out my collection of prop weapons!
Dishonored 2 main gun - https://www.thingiverse.com/thing:3718761
Warhammer Omnisian Axe - https://www.thingiverse.com/thing:3213857
Warhammer Triple Laspistol - https://www.thingiverse.com/thing:3347377
Warhammer Laspistol - https://www.thingiverse.com/thing:3499538
Warhammer staff boltgun - https://www.thingiverse.com/thing:3329751
Warhammer Auspex Scanner - https://www.thingiverse.com/thing:3203711
Warhammer Hand Flamer - https://www.thingiverse.com/thing:3184107
Warhammer Bolt Gun - https://www.thingiverse.com/thing:3146287
Warhammer Bolter Round - https://www.thingiverse.com/thing:3146355
Warhammer Inquisitorial Rosette - https://www.thingiverse.com/thing:1175665
Warhammer Meltabomb - https://www.thingiverse.com/thing:3487900
Warhammer containment vessel - https://www.thingiverse.com/thing:3228986
Warhammer Medicae Combat Injector - https://www.thingiverse.com/thing:3230919