This is kind of a fotm atm, not really but sorta. Some guy made it popular by gettin near 2k with it, forgot his name.... Hyahya or somethin dont remember. Funny thing is it actually works. Your builds deserve better votes cuz they are the current trends. Noobs here won't know this stuff is good till they see these champs banned.

Say that to my 38/13/11 that I just got.
Also, read my description on the runes, you can chose any one of those seals.

You have way too many runes first of all. Only 30 man. and this build looks ok but karthus doesn't need to dive into a group of champs and die... his passive is only if they do catch you off guard then u can try and possibly kill them or hurt them some. Build probably needs more work.