it is too simplified to only consider the best case scenario, extreme example- creature has 10|10 stats but dies when targeted, you cant assume it will never be targeted, the targeted aspect is a balancing mechanism. just as "successful attack" and splitting the damage between two creatures are balancing mechanisms with this card. things arent black and white, best case scenario this card will do full damage, worst case it will do 0 and not spawn a spark (makes it less useful against bone walls, another balancing mechanism), middle ground scenarios the spark and the battlestar *each* will do reduced damage (if the shield is -3 damage, both will be reduced by 3, to a total of 6, rather than if it were a single creature with their combined attack values, which would only be reduced by 3).