its MUI, but, its not exactly the MUI you guys used, it takes up a lot of variable space lol(Even if it makes no lag, but still, its an eyesore, and it uses "Custom Value", where it is used by many people too. so it can collide with other triggers if you used Custom value in another trigger.), i wish i could do the Normal MUI, check out the Trigs if you want.
anyways, if there is only 1 hero that have the skill, then, you got no problem, i could fix it to be no MUI, but takes no Custom value.