New Mage defensive item: The Repeller

The Repeller: Cost: 2800 gold Grants: 300HP 50 Ability Power Unique active: Repel- User gets surrounded with magic circle that stops an enemy champion that's coming straight to the user, and pushes the enemy back to where the enemy originally casted a mobility/leap/dash/blink ability.

Explanation: Let's say an Akali uses her E at the farthest point she can possibly cast and hit you, and she recasts her E and starts making a long leap to you, you activate The Repeller and stops Akali and pushes her straight back where she originally recasted her E.

Another example: Warwick uses his R and uses it on you, and you activate The Repeller and pushes Warwick back to where he originally casted his R.

In debate: the item can repel any form of mobility even if it's a Fizz E which is an ability that makes him untargetable, and stuff like that. One side it can make the item overloaded, but it is an anti-mobility item.

Simple really. Anyway, a few note on this idea: 1- Now i can't say the name fits perfectly for this item, but i guess i'm still working on it. If you have a suggestion on what to name it, please do share. 2- for such a powerful item that can push back an enemy no matter how far, it's cooldown will have to be 150 seconds. I thought of making it just 120 but i don't really know. What do you think? 3- The radius for its circle would have to be really short (like melee range), and can ONLY repel 1 enemy and not multiple. 4- While the build recipe is tricky because what it grants aren't available to what we got here, I say the build recipe should start with something like these.

Make it happen Riot, you already made some AD items and even reworks. Give something for Mage class already. I want a defensive item, nothing esle. Is that too much to ask?