Needs review
Source: Epic Level Handbook

Description: You can cast spells with exceptionally great effect.

Prerequisites: Epic Level, Empower Spell, Maximize Spell, Spellcraft (30 ranks), Ability to cast 9th level spells

All variable, numeric effects of an intensified spell are maximized, then doubled. An intensified spell deals twice maximum damage, cures twice the maximum number of hit points, affects twice the maximum number of targets, and so forth, as appropriate. For example, an intensified horrid wilting spell would deal 16 points of damage per caster level (up to a maximum of 400 points of damage at 25th level). Saving throws and opposed rolls (such as the one you make when you cast dispel magic) are not affected. An intensified spell uses up a spell slot seven levels higher than the spell's actual level. You can't combine the effects of this feat with any other feat that affects the variable, numeric effects of a spell, such as Empower Spell or Maximize Spell.