Naras, the Volcanic Dragon

Flying
Volcanic Breath {2}{b/r}{b/r}{t}: Naras deals damage
equal to its power to target opposing creature. Any
excess damage is dealt to that creature's controller.
You may exert Naras as it attacks. When you do, it
gains +2/+0 until end of turn.

There's a reason the people learned to avoid
Thunderfire Mountain.