Saleen had an incredible learning ability, which was one of his most notable strengths. When knowledge was accumulated to a certain extent, Saleen was also capable of creating his own spells. For instance, the hardly noteworthy Water Shield, as well as the ferocious Eye of Lightning.
It was precisely due to having developed his own understanding of certain measure of the rules to lightning, instead of learning the rules others created, that Saleen was able to quickly advanced into the rank of a grade-8 sorcerer. Advancing into grade-9 was too but a matter of time. His breakthrough not be too slow.
His fireball flew around in the air, killing seven or eight pests in a flash. He was overjoyed. It was but a grade-7 spell, yet it lasted for quite some time. Other than having slightly higher mental power consumption, the spell had little in the way of shortcomings to speak of. It was indeed an ideal spell for dealing with monsters with little intelligence.