I'll review each of his abilities in order. They'll be numbered. (Talking about RZ's Ashbite here.)
His stats are good, but that much HP plus armor is pretty OP for a flying unit. I mean, 2/3 of the enemies already can't even target him. Armor on top of that will make virtually invulnerable. Also, that secondary is a bit UP. Decrease it's CD by 10 seconds and it'll be good.
1. Feast has always been UP. At least give it a buff.
2. I don't really like this power, as it goes against Ashbite's Fire Damage/DPS skills theme. On top of that, it's pretty OP. The way I understood it, it sends all enemies in front of him back to the beginning of the path. This is probably not what it was trying to convey, but that's all that can be gotten out of that description. This would probably go better with a wind themed dragon hero.
3. I like this power, but it needs a couple changes. First off, just replace Feast with this and then find a different power to fill this skill slot. Second, give it a HUGE buff. I mean, instakills take 20 seconds to recharge, and this is most certainly NOT an instakill.
4. This power doesn't fit a dragon hero's theme, if you know what I mean. Beyond that, it's also pretty UP.
5. Ugh, no. Never replace an original power with a stat passive. Please.