You may delay the effect of a spell you cast.
Benefit: When you cast a delayed spell, you may specify 1–5 rounds. When that number of rounds has passed, the spell takes effect at the beginning of your turn. You may cause the spell to take effect earlier than initially selected by taking a standard action that provokes an attack of opportunity. Only area, personal, and touch spells can be delayed.
Any decisions you would make about the delayed spell, including attack rolls, designating targets, or determining or shaping an area, are decided when the spell is cast. Any effects resolved by those affected by the spell, including saving throws, are decided when the delay period ends.
A delayed spell can be dispelled normally during the delay and can be detected normally with spells or abilities that can detect spell effects. A delayed spell takes up a spell slot 2 levels higher than the spell’s actual level.