You Remove Grievous Wounds...

And yet you leave as is. His ultimate is stupid strong, has a negligable mana cost, and has no cooldown. Facing one, I purchased a Morello's and Abyssal Scepter as (The game ended pretty early because no lane did well). When fighting he bought a Rod of Ages and proceeded to walk through all my turrets and my upgraded turret, missing his snare, and then pressing 2 buttons killing me. Theres no way to dodge it, and he can do this indefinatley until I die if he doesn't kill me the first time. This wouldn't be so bad if he wasn't super tanky. The only way to kill him is Grievous Wounds and yet you decide that you need to remove it for some reason? Morello's doesn't even work that well against Swain because he never falls below the health threshold for the passive to activate.