Well , for sure most of us wouldn`t know what to call it , let alone know how to or be able to make it !! An excellent demonstration of your skills . What is the material ?
Trying to do so freehand is proving difficult.The next step is to do one with the outer masses cored out a bit.Not sure about undercutting it cause I like the arches inside.
Awesome job. Did you use the "Special" tools to do this? Duh!! just reread your post and obviously you didn't.
I really like the result .
Thanks for showing.