User blog comment:V0ldek/Yone, the Death's Debtor AKA Yasuo's brother/@comment-5035765-20131216213854/@comment-7709681-20131216223012

I must agreed with Ifferm, too much passive power, specially during the ult.

Passively has Infinite Health/Mana sustain, Infinite AD increase and ignorance of unit collision.

Actively you have a infinite increasing damage attack modifier, a slow that deals true damage, and invisibility. Not to mention that once he uses his ult. all his abilities deal true damage, and gains two gap-closers and a 2 sec. stun.

The champions that deal true damage have only one source of this, regardless of being able to apply it through another ability or not (e.g.: applied by  &  applied by ) while you gave him one active source of true damage that scales with his infinite source of AD.

You should balance/nerf him... a lot.