FIRESTORM

Syntax: cast 'firestorm

Calling upon the mightiest forces of fire and hell the Invokers can create 
this virtual storm of fire and brimstone.  As the hellish maelstrom of fire 
and sulfur twists over the area, it rains flaming debris on all those that 
cannot take cover or are unlucky enough to stumble into it.  The enchantment 
takes immense concentration on the invokers part and is not easy to maintain.