Voila ! Now you are ready to battle as a dwarf :)
If you made it well, the hot glue will hold the parts during battle. And when you want your old helmet back, they can be easily removed with force and/or heating. Then just use a sand paper to get rid of the glue remains!
You can make the whole "helmet decoration" from real material. You can cast the ribs from metal and make beard from a sheet and then attach it to the helmet with rivets. But I wanted to used it again with an old look :)
I hope you like this instructable and that it was helpful!
If you have any questions or compliments just write a comment! :)