I think this could be problematic when combined with one of the many different rainbows. With just a single card you could protect all of your SoGs, Eternity/Pulvy, your shield and all of your towers.
This.
If this card doesn't get destroyed immediately after it's played, then the majority of rainbows have a way to protect nearly ALL of their permanents that are on the field hands down. False Gods with heavy Permanent control (Divine Glory, Hermes, etc.) would be screwed over by this card alone.
My personal suggestions on how to improve this card are changing the ability to have it affect certain permanents or to have the protection be last only a duration (1-4 turns?), or even changing the quanta cost of the ability itself.
If you want this to get into the crucible, please try to do the following:
-Place the symbol
after the Card cost number. Have it match the card cost on the card exactly
You could also fix your grammar, but that's just nitpicking.