How about the concept of "spell steal" ?
Like, a guy with an ult that allowed him to steal a spell from someone? Like, when he gets his ult, a small menu would appear like in
's passive and after you click on the enemy champion that you want to steal from the menu would switch to a menu with the spells of champion you chose to still from.It would have like only one use and then the ult goes on cooldown for about...180-150 seconds.
What do you think of a concept like this? Too OP? A noob trap?