You can cast spells that take effect after a short delay of your choosing.
Benefit: A delayed spell doesn't activate until 1 to 5 rounds after you finish casting it. You determine the delay when casting the spell, and it cannot be changed once set. The spell activates just before your turn on the round you designate. Only area, personal, and touch spells may be affected by this feat. Any decisions you would make about the spell, including attack rolls, designated targets, and determining or shaping an area, are decised when the spell is cast. Any effects resolved by those affected by the spell, including saving throws, are decided when the spell triggers. If conditions change between casting and effect in such as fashion as to make the spell impossible - for example, the target you designate leaves the spell's maximum range or area before it goes off - the spell fails. A delayed spell may be dispelled normally during the delay, and can be detected normally in the area or on the target with spells such as detect arcane. A delayed spell uses up a spell slot three levels higher than the spell's actual level.