Halloween - how do I make a horn

My neighbor got new carpet. Carpet comes rolled on 10’ cardboards tubes (think very heavy duty paper towel tubes); I kept one of the tubes. I have a room over the garage & a lederhosen shirt. My plan is to convert that tube into an alpine horn to play some music (via a small bluetooth speaker & slide candy down it on Halloween.

The end of the horn is both at an angle & flares from the diameter of the tube (yeah, the whole horn gets wider in diameter as you go, but this is a one-time use Halloween decoration that will mostly be seen in the dark; IOW, it doesn’t need to be perfect.

I do have a large styrofoam ball that came from some bouy/floatation device that I could attempt to carve (but if I screw it up, I only have one), I could try some chicken wire & paper mache (how well will that hold up if it’s rainy on the 31st?).

C’mon you arts-&-crafters, what’s the best way to make a flaring bend for something new in the Halloween funness this year?

Cut the end at a 60 degree angle, twist the end halfway and there is a 120 degree bend to get the horn angle. Tape it up. I’ll leave the flare to someone else.

Partially inflate a balloon. Using newspaper and thinned white glue, make a papier mache bell. Affix it to @Saint_Cad’s bend.

This might be more crude than you’re looking for, but worth a thought …

Buy a large plastic funnel, one with a ~10"+ mouth. Here’s an example, although not the ideal shape:

Cut off the narrow end such that the ID of the narrow end is just larger than the OD of your carpet tube. Slide the funnel over the end of your tube and connect w duct tape.

Gussy it up with non-structural papier mache on the outside as desired. Or even strips of duct tape starting at the rim and ending farther up the tube so the exterior flare shape is longer and more tapered. It’s still not a changing flare, but at least it’s conical. And stupid easy to make.

I’ll bet Walmart or Target or Michaels has a basketweave Horn-of-Plenty that would be dandy.

Yep. You need an armature the shape and size wanted.

Can be any thing. Made or found. Attached to the tube. I can see tie tights or duct tape being used. Cover with something decorative paper or cardstock, the color needed.

(Beware, cutting a cone shape can be tricky).

Waterproof as best you can. Hope for dry weather. (Papier mache’ thoroughly cured is able to withstand some wetness for awhile)

Lots of folks building armature models use foam core board. I was never good cutting it carefully enough to make accurate models. It glues really well. There’s that.

We’ll need a picture if this works. Just sayin’

ETA. I was looking at pix of this horn. First you must be a hoot in the neighborhood.

Second, I know these heavy cardboard tubes. I’ve used them for stuff. They are seriously tough to cut. I used a band saw to cut rings from one tube, one time. But…if you can cut slits at the end. Spread the slits open. Maybe dampen them a bit to ease out the spread. Fill in with other cardboard with glue/or tape. Cover, decorate or paint.

Could you cut the top of a very large plastic bottle to be your flared horn?