User blog comment:WAFnuke/Kun'Tah,The Hunger of the Void/@comment-8662171-20130916013915

Dat scaling true damage. It's a little over the top, seeing as that this is for every AA during the period of the R, and it being 110% of your dang AD. If you have like 200 AD that would be 220 extra true damage per hit, which is more than a ruby crystal per hit, not to mention that you slap on another eighty damage per, so with 200 AD with full stacked R (Which would be higher, but I digress) You would be doing somewhere around 500 damage, with 300 being straight to the HP bar.

This is absolutely gamebreaking, and combined with those other abilities with rediculous AD scaling, you would 100-0 someone in no time flat, especially with things like BoRTK and Red Buff.

Also, it's possible to go beyond 100% lifesteal, so you should probably change that to a flat bonus to lifesteal that scales with level.