MR Thornmail

So does well to protect against AD attack speed champs, but with the addition of in the game and seeing more use out of , I was thinking that either a change to Thornmail or the addition of a similar item to guard against AP might be a good idea.

From what I've seen with Kai'sa, they normally build Rageblade into and then ; haven't really seen much AD being built on her. You also have building with Rageblade, but it's usually with and ; if he ever does go AP it's usually without Rageblade, but you can't really ignore the possibility that he could build around it to be more AP attack speed. Last little mentions would also be and

Other possibilities that could happen but I feel are doubtful to, would be:

I'm not saying it's necessary that Riot makes an MR version of Thormail or changes it to include MR into its stats. I just wanted to hopefully spark some thoughts about a possibility because this meta has become pretty wacky with how flexible so many champs are in their positions, as well as the obvious increased use of Rageblade.

So what do you think?