This is the blast of spellware. It is forbidden in most of the DragonEmpire, as it allows mundanes to duplicate the abilities of their draconic and sorcerous betters.
When used, energy bursts from your mouth, causing Magic +2 damage. It can be used once per day. Your mouth must be exposed to do this - you cannot wear a speace suit, gas mask, or full helmet.
There are several options available for this spellware.
First, the energy can be either sonic, cold, fire, electricity, or acid. Note that the sonic version - often called Sonic Cry Spellware - is not considered as illegal, as it does not imitate any dragon. It is still frowned upon, however!
Second, it can either be a normal ranged attack (called a line) or a point-blank-range area attack (called a cone), that is unable to attack anyone beyond your Magic attribute in meters away.
Extra schticks can be spent to improve the damage by +2 or to grant extra daily uses.