^ Constantine did say that not even God himself could breach his "seven seals" incantation(s):
http://imgur.com/JyGf1s6
However, he also said that Pandora wouldn't be able to break the binding spell he placed on her chains... But that didn't stop her from effortlessly doing so nonetheless:
http://imgur.com/JCFw04u
http://imgur.com/drthu68
Suffice to say: John was clearly speaking in hyperbole/overrating his magic. After all, if Pandora can own his magic with ease, obviously God can as well.
That being said, the JLD wins.