Would the new original art version of Obelisk the Tormentor be legal?

I have gotten the original art Obelisk the Tormentor in Jump magazine a while back and noticed a few things. I know that the god cards are banned because they have a "hidden" effect. That effect being properly igned to each one and can only be recited by memory making them banned. Such as using a Japanese card in the American nationals. However, since the original art obelisk is the only god card that shows it's effect and not on the official banned list does it make it legal to have it in a deck or no?