User blog comment:Lightsuperior/Katsuka, the first ninja/@comment-25534262-20141109161633/@comment-7709681-20141109225038

Global Gap-Closers does exists, be this unit-targeted (Nocturne), ground-targeted (Pantheon and Twisted Fate) or ally-targeted (Shen and the summoner spell Teleport).

If looking for passive stealth, then Evelynn does have it. If looking for spammable stealth (At least temporaly; permanently, as you propose, sounds toxic), then Vayne and Kha'Zix does have such.

If you wanted to convince the readers about your concept being a good idea, then you had the blog post itself to do so (And you already saw how that turned out), not commenting about it being good.

And Kalista is an unique concept, is the second true utility-based ADC in the game, with the first being Ashe. Small dash by stutter stepping, semi-global vision, pseudo-infinite single targeted ability, skillshot that carry on stacks to following targets, and the first true ally-manipulating ability in the game (At least with Thresh the player have the option to not click the Lantern, here they do not).