Finally I got the 740G Darkus STEEL Moskeeto. It comes in the B3 BakuCore booster but I'm pretty sure this is STEEL Treatment not the Smoke treatment or whatever you call it. It is identical to the 700G one except the G's of course. And then I also bought another 700G one just in case because I couldn't tell from the outside which had the higher G's I wanted. But I guessed right and decided to keep the 700G anyways, thinking that the cards in it will be at least different but no, the cards I got were exactly the same as I got last time, with the exact HOLO Water Gun card. Sad.
I call it Darkus Core Steel. For the inside, or "core," is solid black, but when it is in closed ball form, it looks completely Steel.