Rapid Metamagic

(Complete Mage, page 46, DnD 3.5)

[General]

You possess an uncanny mastery of your magic, enabling you to modify spells on the fly much faster than others can.

Prerequisite

Spellcraft 12 ranks, ability to spontaneously cast spells

Benefit

When you apply a metamagic feat to a spontaneously cast spell, the spell takes only its normal casting time.

Normal

Spontaneous casters applying metamagic must either take a full-round action (if the spell normally requires a standard action or less) or add a full-round action to the casting time (if the spell takes 1 full round or longer to cast).