Is it possible to make riven ultimate have a timer under her health to know when it will end?

Aatrox have it under his health too so I think it would be nice to know when it will end. It will make it easier for new players to know when it will start or end, because it is really hard to see with her base model and effects. One game, I though it had ended because a lot of time passed but it was still active (it's kinda hard to notice the sword in a fight). Thanks for reading.