There is a testing group that tests it. I'm positive that they have in fact tested it and made sure it was in fact balanced. Feel free to challenge them to some matches where you use that card and they can't. I think they will teach you there are plenty of counters to the card. Three in particular that you can challenge are:
and
.
RE: 🔥 DAR GOTTEM GEARNUT — The Dragon Gnome Rises!