Kill countdown (x2, triple, quad, penta).

I Just had this idea, its not something cool but just a small detail for gameplay. So when you get a kill there will be small countdown were your passive's icons are (like when you get ignited theres a countdown and you can see it when it ending ...) which will show how much time left for the next kill spree, lets say you get a double kill, then this will refresh and countdown the time you have for the triple, for the quad etc... . It's nothing really but just my idea xd. Leave your thoughts.