Rain of Fire
Known though out history as on of the grate plagues of the Cataclysm, Rain of Fire is perhaps one of the most devasting spells used by Channelers. Capable of destroying vast tracks of land, and leaving them barren for generations. Thankfully Rain of fire is very difficult and is rarely seen in our time.
I believe it should be throughout, tracts, and Rain of Fire. Also, the second to last sentence is a fragment.