Just think. The mighty Ragnaros, elemental lord of fire, gets banished after it takes 40 people to destroy him in the Molten Core. After three expansions (which is plenty of time to get back to health), he is restored and energized with Deathwing's power.
Then he hits you with this spell and you take 5 damage. Wow.
Inflicts 5 Fire damage to an enemy.