I too have stated before that calculating an opponents nora is not very difficult and its no secret, ,, just depends on hiw fast yer math is , at the sametime moving runes. having it calculated for you is no different. and it may help some players. but I do agree that it will make it possible to guage sneaky spells more accurately, and thats no good. if there was a way to do both, (conceal spell use),, then it would be fine,,(hiyashis idea isnt to shabby), but if it cant be done,, then showing mana is a bad idea.