Battlecast Undead+Explanation

http://boards.na.leagueoflegends.com/en/c/story-art/puLyj4xA-solid-proof-that-viktor-is-normal-and-heimerdinger-is-a-crazy-mofo?comment=000c00000000000000000000000000000000 ^Here is my reason for suggesting this.

If the Void needs to be stopped eventually, perhaps transferring the souls of the undead into mechanical bodies would help further that agenda rather than using the Voideborn themselves. They don't need to be battlecast per se but it would be cool.