That looks pretty good but it lacks a few things.
It's kinda blurry, you must have added a lot of blur! The border looks perfect with lowered opacity but what's that pink shade in the bottom right of the signature?
Another thing, the lights from the top right are not properly used, it looks like white empty space instead of light flares that indicate the direction of the lightning. And as everyone mentioned above, the text just doesn't suit there.
Nonetheless, good artwork as always, 7/10.
