I love it. Somewhere between Crimson Hellkite and Lightning Crafter, or perhaps Kamahl, Pit Fighter. Seems pretty strong, but I guess for 1 more mana you get Visara the Dreadful, so it's perhaps plausible.

I note that Wizards have generally avoided putting abilities on their fatties for a while, especially dragons and demons. They annoy players who want to get to attack and use the cool ability. This might be more likely to be an attack trigger these days.

Most cards, I'd agree that tap abilities on a fatty should be avoided, but this is so obviously a top down take on a dragon diving while breathing fire, that I'd be upset to see it gain the attack trigger. Nice, solid, simple and unique. Good job.

The tap ability sort of is like attacking.