Taric Ult - Clarity Improvement

Playing with a lot of Tarics recently, and i had the thought that it would be super useful if there was some sort of indicator of when the invulnerability would trigger. (first thought that goes through my head is something along the lines of Scarners pillars where u capture the point, put this on tarics ult and boom super clear when the effect will trigger)

Your team would benefit by knowing how long they have to get into your ability before they lose out on the buff. The other team would also know how long they have until they are totally fucked(sense of impending doom is fun), and allow them to respond to this ult slightly more effectively(ie if you know its about to trigger u won't use a ton of stuff to try and burst). I feel good players already have the timing down so adding this would really just help players who are not as skilled or simply lack this knowledge, and allow them to play the game more efficiently.