I like the idea of attacking twice but I think this creature shouldn't be fire
Gravity
Well actually, i see it more in fire, death, and darkness. "Vengeance" (NOTICE LE SPELLING SEMPU!!) is usually associated with pain, suffering, evil, etc, and therefore should be placed in one of the three.
Also, i do suggest a nerf in its health, maybe decrease it to 2 so that it may be more susceptible to shield CC. It would also match most fire monsters, having little health but high attack. Giving it 4 is also quite odd, since the Crimson Dragon has 12|3 as its stats, making this card have higher health than it.