It costs $35 to copyright (an online filling)
My company trademark of "Bisjac" is all over the build.
Save is dated before anyone had claimed ownership of the build.
could be wrong here, but according to badspot's blockland's terms, it looks as if i could probably claim original work of my document, even using blockland's likeness.
Runescape also has a huge section on the site about the intellectual property rules for fan fiction and screenshots.
Since the build differs enough from anything remotely resembling runescape, and only uses its terms and name, im pretty sure im in the clear there.
I would even be so nice, as to allow you to use my document all you like, and addon to it. as long as you continue to give Bisjac, Blockland, and Runescape credit for it's likeness.