Talk:Madred's Bloodrazor/@comment-4706403-20120606074049/@comment-79.175.117.108-20120612124020

It will stack with Kog Maw's Bio Arcane Barrage. It will deal 10% of their maximum health as magic damage, but that damage will be reduced by magic resist. So when you have 100 magic resist that reduces 50% of magic damage and your target is having 3000 health. Your attacks each would deal 300 magic damage but with reduction of 50% you would deal 150 magic damage on each hit. Also don't forget that this only adds additional damage to your standard attacks, you will also deal physical damage that is affected by armor.

So your enemies need to build armor and magic resist just to counter you. This is the reason why is malady or any other source of magic reduction a must have on kog maw. To maximize your damage output. Also not that even 50 ability power will grant him 1 % in his barrage, so buying something extra of ability power will be useful.