Don't forget to calibrate spear head size for diameter of your spear stick. And be careful while using sharp tools.
You need 4 piece of 20mm m3 wood screw and a broom stick.
Note: If you want to use it as a casting model i recommend;
black pla (or if you can find, transparent(pure) pla is better for casting)
0.2 mm layer
options for using less pla for lost-pla casting process.
Filament Dünyası PLA