Arcane Preparation
( Complete Arcane, p. 73)[General]
You can prepare an arcane spell ahead of time, just as a wizard does.
Prerequisite
Ability to cast arcane spells without preparation,
Benefit
Each day, you can use one or more of your spell slots to prepare spells you know, usually for the purpose of applying a metamagic feat to the spell--but without an increase in its casting time. Preparing a spell uses a spell slot of the appropriate level, and once prepared, that slot can't be used for anything else until the prepared spell is cast.
Normal
Spellcasters who cast arcane spells without preparation (such as sorcerers and bards) who apply a metamagic feat to a spell must cast it as a full-round action instead of a standard action.