Sudden Maximize
(Miniatures Handbook, page 28, DnD 3.5)
[Metamagic]
Once per day you can cast a spell to maximum effect without special preparation.
Prerequisite
Any metamagic feat
Benefit
Once per day, you may apply the Maximize Spell feat to any spell you cast, without increasing the level of the spell or specially preparing it ahead of time. You may still use the Maximize Spell feat normally, if you have it.