a storm upgrade for counterspell: after reflecting an ability, you have 100 spell armor against his abilities for 2 seconds

Good hero overall, the trait is kinda cho'gall like (with armor and spell damage increase and reduce) Q: O.K, feels like Kealt'has' living bomb and Ragnaros' blast wave combined but affects on spell power and not on moving speed W: Is this around Moam? or a target of choice? feels, again, like Kealt'has' living bomb or like Probios' warp rift. E: Damage based on mana usage, but I feel that most mages in team fights have low mana or medium in percentage to their max, maybe switch that?...