Because I have twice the amount of elo you have, which is quite a large amount?
Runic Bulwark stacks if you get it twice, doesn't matter if someone has it or not, I was just giving friendly advice here, no need to act like I was attacking you or something. Shyvana allready has a great initiate so she doesn't actually need the speed boost, that's why I was wondering >why< you bought it, not "OMG YOU BOUGHT THAT YOU NOOB LOLOL".