Jhin the Virtuoso is now available in League of Legends, and there's a handy Spotlight available to show you what he can do. One of his main gimmicks involves shooting off four bullets, after which he has to momentarily reload -- with the last bullet scoring a guaranteed crit.
He has a decent kit at his disposal too, with decent wave-clearing options with his Q, and plenty of technical abilities (zone-sensitive skillshots and traps that essentially function as wards). Aesthetically, Jhin is a pretty cool little addition. He sees death as "the most important moment" in a target's life, and revels in it.