User blog comment:TheMithrandir/Champion Preview, Robert Prince of Mischief/@comment-24.131.216.74-20121203195857/@comment-5823669-20121203201217

True to that, 2 karthus ultis, and worse of all powered-up would be OP. but maybe to somewhat compensate, the range of his ulti would be really close, lets say like choogath's ulti, and that it can only steal skills from live champions.