User blog comment:Oddgasm/Osmeria, the Ethereal Despot/@comment-7709681-20150902000327/@comment-7709681-20150902161721

@ Oddgasm: Because of that precise example you gave: You're devaluating the opponents' earned gold, but with an extremely delicate statistic.

You see, commonly is this the same concept applied to passive/innate auras, and the very concept of invisible power: there's no active form of gameplay or counterplay, is just always there and you nor your foes can stop it or interact with it.

And what I meant that this is a delicade statistic is because is the one from which your life depends off, much like Mana Burn is to Mana: You're oppresing the opponents' gameplay experience to either suffer or not wishing to encounter you, even if it means to waste a precious ban just to not deal with him.

This means that, damage wise, flat sources of damage (such as the Q and both Rs) become more effective the less health the target has, even without building damage, but here you have this applied to anyone, even high health targets, making all scenarios ideal (which should not be).

This also means that, utility wise, champions that innately or artificially scale with their own health have decreased scalings, as well as making health sustain less effective as the health pool is decreased, turning their earned gold even less effective, and they become less inpactful inside the game (And purchasing both Armor / MR reduction and Griveous Wounds on top of already having HP reduction just would enhance this even further).

Isn't better to make your "Purple Health" be composed of a percentage of the cummulated damage dealt to the target (Like Tahm Kench, but for aggresive gameplay instead of defensive), rather than substracting their health?