Syntax: cast renewal The renewal spell increases the duration of all enhancing spells currently affecting the caster by one hour, up to a maximum of twice the spells normal duration, though there is a chance for renewal to fail once the normal duration has been reached. Also, it increases the level of those spells, up to the level of the renewal spell. In addition to its casting cost, renewal drains mana based on the renewed spells' basic mana cost and duration. See showskill renewal for more details.