New Champion Ability Idea(s)

I was playing the other day when the idea for a new champion ability came to me. It was something nifty and cool, and in a way it would be unique. I don't really have a name for it so I'm very much open to suggestions or comments. I looked for similar posts, but only managed to find one from two years ago.

Basic Ability: The player's champion extends a limb (such as a tail, tentacle, mechanical gizmo...) to either deflect or block an enemy champion's ability-based projectile. If timed perfectly (meaning that your limb is at it's furthest point of extension), the projectile will be reflected 180 degrees and will deal damage as if it was cast by you. If not timed perfectly, the projectile will simply be blocked. Cooldown: Scaled by level or based on the cooldown of the ability blocked.

I do hope this is the appropriate place for this post and I look forward to hearing the ideas of others!

-The Krock