The original flashkit forum. Zanzarino is the games developer. He created bonewall because at the time the majority of top-50 decks had 6 eagle eyes, 6 flying weapons. Plus every single deck had deflag/steal. It made shields and creatures practically useless.
Originally bonewall only cost 3 death quantums. That was very bad- I even campaigned against it. You could take ANY deck, give it a death mark and throw in some bonewalls and make it far better. Look up my "firewall of death" on the wiki for an example.
And the quote in my previous post is a link if you want to read the original post.