Mind of the Virtuoso is what happens when you try to artistically translate the abilities of a League of Legends hero. Either that, or they just wanted a cool trailer.
Riot Games has released a new trailer for League of Legends that teases a new hero. The trailer isn't a traditional look at gameplay, but rather an artistic representation of what are possibly some of the upcoming hero's abilities.
Looking at it, you could see that the character has a gun that shoots bullets which can grow into trees. There's also definitely a mask, a very cool mask.
Instead, we could imagine it's a concept trailer for the fourth season of Hannibal.