Discharge

Effect
(effect increases with skill)
 * Increasing Discharge level raises the focus cost, but lowers the fizzle chance.
 * Air Attunement affects the damage and stun duration.
 * Stacking and charging glyphs improve the focus cost, damage, and stun duration.

External Reference

 * This is extremely old and outdated information only for historical purposes: Magic, Combat, and Crafting Skills on the Shroud of the Avatar Forums