Why does True Damage exist?

[{quoted}](name=The Big Piece,realm=NA,application-id=3ErqAdtq,discussion-id=MpRMBNfm,comment-id=0006,timestamp=2016-06-13T04:43:50.796+0000)

Makes tanks killable. The problem is true damage that scales with health, thats just completely broken and illogical.

depends. it works on garen without being overpowered, since it actually only is a small portion of his damage. and his ult damage can still be mitigated by sustain. he doesnt get a lot of true damage if you dont get into kill range, or you get out before he reaches the health threshold. then there is the restrictive nature of the villain emchanic, making it only work against 1 particular opponent. its generally avoidable by getting out of spin range. his kit itself has enough counterplay to make it work. basically you cant itemize against this portion of his damage, but you can still play around it.

this is not the case with vayne and only partially possible with fiora.

on fiora its frustrating to deal with due to the rng nature, but her intended melee adc build also leaves her squishy in melee which makes it easier to outright kill her than vayne. her true damage is crazy, but to get it, she has to come into arms length. counterplay in lane is still difficult.

on vayne its batshit broken, because it makes simply too much of her damage, and the intended counterplay (3 hit mechanic) doesnt work in reality due to her mobility from her q and passive. you cant step out of her range to prevent her from getting 3 stacks and force her to switch target, because shes too sticky. they made the counterplay to silver bolts to run away from her to deny her her third stack, but then included tools in her kit that makes it impossible to run away from a vayne.

{quoted}

^ made no sense and what the hell is pure dmg?

It's like true damage, but it works even through invulnerability effects such as a Zilean ultimate. That is, if you are under the effects of Zilean ult and receive pure damage you will die normally