Talk:Zed/Strategy/@comment-2179912-20130427231525/@comment-9205285-20130515104451

the active adds more damage potential to his ult. the 15% damage adds to the total ult damage (the actual damage + when the mark goes off) and the slow keeps the target in place for you to get more auto attacks (also the extra attack speed you get with BotRK) in before the mark goes off and makes razor shuriken easier to aim.