Ok, I was going to complain before realizing, that as a Dragon-type Naganadel, it means that the only gen 7 mon without a dragon-type (that is dragon-type in game) left is Guzzlord. A goddamn shame for Mega-Sceptile, Amphy, Noibat and Tyrunt, the last two had their chances on Dragon's Majesty but didn't get crap.
The ability is pretty dang good, makes Beast Box or Blacephalon GX decks much better, and you can recover your stuff as easily with Rescue Stretcher.
The attack has a heavy cost, but it hits a relevant number, 170, because even though we won't have Lele post-rotation, Dedenne GX sits as a bench warmer, so Malamar decks have the option to use their Ditto to evolve into this and hit for game. The L for the GX is irrelevant, utterly outclassed by Blacephalon GX or any other usable ultra beast so a bad rating for that
Overall, still, a pretty damn good card.