My only slightest objection to the fact that this card breaks the immortal rule is that it could potentially be used offensively. As a buff, I have no problem with it being able to target your own guys. The real breach I feel would be when an offensive thing (Say, "Phase Lightning") appeared that could target supposedly untargettable guys. But mechanically, I don't think that this possibility (which is mostly Quint+Wisdom on an opp's creature, +reflective shield) is powerful enough o warrant a change to this card at all. (Indeed, that deck sounds crap. Please by any means demonstrate that I'm wrong, but it seems to me you'd be better off with Antimatter + Offense of your own).