I think this card may be a bit overpowering considering it is in an element where creatures are very inexpensive and can easily be put out in mass quantities. Life's creatures already attack for very high amounts on low quanta cost, and this card would make life rush much easier to pull off. I don't think life needs a card that buffs its creatures more. As for the protection mechanic, I think that this definitely has potential. I would like to see more forms of self-protection against 'deck invasion' (GotP-nightmare) other than Sanctuary. Keep working with that mechanic, I think it has a lot of potential.