This is just the result of some quickly playing around in Blender.

It's a really simple dragon. By default it has just 3 links and there is a keychain version (which is probably too big for most people to actually use as a keychain, but if you're into oversized, here you go.

I added a full size dragon with 8 links as well.

I hope you like it!

No supports, .15mm resolution and 3 outer walls, >10% infill.