Forgotten Realms: Birthright
You can cast spells to maximum effect.
All variable, numeric effects of a spell are maximized. A maximized spell deals maximum damage, cures the maximum number of hit points, affects the maximum number of targets, etc. as appropriate. For example, a maximized Fireball deals 6 points of damage per caster level (up to a maximum of 60 points of damage at 10th caster level). Saving throws are not affected, nor are spells without random variables.
An maximized spell adjusts a spell by three levels.