I made a giant fantasy halberd out of somewhat cheap materials. You can find most of them around the house.

Supplies

I used:

-cardboard

-copper pipe (you can use a broomstick handle)

-wooden dowel (not needed unless you want to make it really tall like I did)

-air-dry clay

-paint

-hot-glue

-tape

-small wooden plank (optional)

-paper

-toilet paper roll (not really needed)

-half cardboard sheets (I don't know what they're called exactly, I found them in some packaging, they're like a piece of cardboard but a side of the paper is missing?)

I had most of these lying around at home because i'm a hoarder, but some were harvested from packaging boxes that were bought online such as the cardboard and half-cardboard. I bought the copper pipe though.

Step 1: Making the Handle

I cut my wooden dowel to the size I wanted and sanded a bit of the end to stick into the copper pipe to extend it. (Sanding took forever because I didn't have any power tools.)

I also stuck a spare wooden plank on the end for the spear bit.

To attach the plank, I taped it in place with some skewers for support, and used a lot of hot glue.

Step 2: Paper Mock-up

I drew out the design I wanted and then made a paper mock-up to scale. (I didn't end up using that tiny one you see in the picture.)

Step 3: Spearhead

I made the spear part with cereal box cardboard cut to shape, scored and bent to make a bevel. I sculpted the end with hot glue, I didn't have air-dry clay at this point, so clay would be easier.

Step 4: Axe Part

I traced the paper mock-up on cardboard and cut out 2 identical pieces.

I only cut out the body (axe and pike/scythe part) because I wanted the spear part to look separate. (And because it wouldn't fit even on my biggest piece of cardboard.)

Step 5: Gluing It On

I carefully bent it around the pipe and hot glued the edges together.

Step 6: Bevel

I cut out a smaller body part to have a raised area to have a beveled edge. This part is optional.

Step 7: Sculpting

I sculpted the bevel out of air-dry clay. It ended up cracking in a few places for me, but free weathering!

Step 8: Painting

I first painted it black, then dry-brushed silver for a worn look.

Step 9: Handle

I wrapped around a half cardboard sheet to make the handle thicker and easier to paint or else it would rub off if it was just on the copper (but I didn't end up painting it because I got lazy.)