If I have the following:
Generation School
Associated School: Evocation.
Replacement Powers: The following school powers replace the intense spells and force missile powers of the evocation school.
Lingering Evocations (Su): Any evocation spell you cast with a duration greater than instantaneous lasts an additional number of rounds equal to 1/2 your wizard level (minimum +1). At 20th level, any dispel checks made against your evocation spells must be rolled twice, and your opponent must use the less favorable result.
How does this affect say like a fireball? I'm just not too sure about the mechanics of the Lingering effects whether there's more damage done or what.
