how would you go about making these antlers?

I'm cosplaying medium from feed the pit!! i have these cardboard templates of her antlers, but i have NO idea what to actually make them out of. i want them to be decently lightweight, but not floppy and weak. tysm!!

i was considering layering cardboard a couple of times, then using airdry clay (like ive used for her teeth/face), but the cardboard isnt very strong and I'm worried it'll be floppy. maybe you guys have some idea for a solid structure?