You guys like saying OP quick, I am just saying that when you already have bonewall in hand, you will eventually play it anyway, so it might as well stack upon the first one, instead of waiting untill the first bonewall runs out.
So comments like this are really unneccesary:
bonewall is powerful enough as it is. this would give it a big shove into the OP taboo of the game. its been suggested before. i dont think it will ever happen
Bonewall isn't that powerfull, bringing out enough creatures destroys it quick, because of adding the 7 new bones instead of playing them 1 turn later doesn't give it a "big shove" to being OP.