The issue with my weapon is that I picked a combination of two, a battle axe and a scythe.
The battle axe side of the weapon was easily made by creating an orb and flattening it down a bit. Not entirely flat as this forms the sharp edge of the blade.

The next thing I done was create a smaller sized cylinder and lined it up using top view/wire frames to align the outer edges of the cylinder with the second most inner circle of my flattened ball, once that has been done I then copied the cylinder and done the same on the opposite side.

I then used booleans to selecting the flattened orb and then one of the cylinders and using difference booleans to remover the overlapping parts of the objects and then repeated this on the other side.

This left me with a double sided battle axe but as this isn’t what I was going for.

I picked one side and revoked the top half, this then gave me the freedom to stretch out and curve what was remaining to try and form a scythe blade.
Currently I am still trying to perfect the scythe blade, what I need to do for this is add some more vertices which will give me greater manipulation of the shape as the current model has some faces larger than others which means when altering it doesn’t bend perfectly.
(Some pictures to be added when back home)