Sylas major W Bug [GAMEPLAY]
As the video shows, if Sylas is traveling towards an enemy with his E chain grab, and uses his W during the travel, the animation and sound plays, it goes on cooldown, but the damage/healing does not actually go off.
I took this into training mode and tested and this seems to be the case. In a situation as shown in the video, this bug removes a major outplay mechanic if you need a heal quicker (for example someone else that ISN'T being grabbed is hitting you, you need that heal during the travel portion once you get in W range rather than after the knock-up occurs)