Also, allowing this spell to damage the opponent, even without combo, means for example that you can do 24 damage to the player + kill an armagio of the unlucky player using one (or even better, he plays 2 armagios, with -extremely- lucky rolls you can do 24 damage to one + kill the other + do 49 damage to the opponent, this with only 8 quanta and one card ; and even with the most unlucky rolls you would at least do 12 damage to opponent and 13 to the second armaggio before killing one in this situation).
This card is already powerful enough without the "can damage opponent" part. There is not one mass spell in the game also damaging the opponent, no reason to make this one the exception.