Sylas Ult

My only concern as of now is how players will know which ult Sylas is rockin' so they can play around it. Seems a bit OP to have a "mystery ult". Yeah, there's an animation for when he steals it, but he can hold it for some duration of time and no one will know what they likely face when they engage him. Paired with the current two-shot meta, seems like this is too gimmicky to be reasonable, especially with some ults that make/break champions.