How about an Item that increases Cool Downs

We have an item that reduces attack speed ( ), movement speed( ), and healing over time () . Why not make an item that either increases the cool down of the last spell an enemy champion uses by a certain amount (or percentage for non-ults). It would have to hurt the users of the item and within a zone so Global ults that target everyone or ally only ults won't be affected. Probably a tank oriented item so health and/or armor and mr on it as well. This would give a counter item to people who become ridiculously strong with high cool downs ( off the top of my head. I don't know how to balance it but the basic idea is it would either add seconds or remove an amount of cool down (able to go into negatives possibly like speed debuff).