It should probably be worded as 0 Guard or Omniguard.
Either way, this card looks outright ridiculous. Let's burn out the opponent's hand so they can't null at all against Critical 2 Monsters! It's only one damage flip! Itsk too, I run Cursed Lancer.

Card is broke, imo. . _.

So now you changed it from a broken concept where you at least had to face the decision of which of the five G2s you'll run to "oh, here's a better heal trigger that will obviously be ran." I really think you just made it even more broken. I don't see this concept ever actually being stable, and the fact that you're giving it a lot more benefits is even more ridiculous.

For such a broken effect, maybe make the effect a SB (12) or somewhere along those lines. That makes the effect highly hard to activate, but still kick-a**. Would work great in a Pale Moon deck that way.