Kassadin Build Guide by tomtombombomb
Not Updated For Current Season
In the beginning do not rush in. hang back till lvl 5 then start to push in a bit more. also sorry i do not have a rune or mastery order. i have not figured all that out yet.
this link will help. i didnt make it but this is what helped me. http://www.youtube.com/watch?v=Da7ReypE5ck