Actually, not sure this is the gaping dragon. The gaping dragon has six wings, I think. It would make more sense for this to be the one Everlasting dragon left, especially as there is no, well, gape.
Both Gaping and Everlasting got 4 wings. And since it got the tag for Gaping Dragon in pixiv, I just assume it was the artist preference to go with some closed gap look.
