My curiousity comes surrounding an assassin in my party who has learned several swift action spells. The rules in the PHB about metamagic feats with bards and sorcerors tells us that using still spell with a spell that has a casting time of one standard action will make it take a full round to cast. After the publication of Complete Adventurer, several spells were given the casting time of one swift or immediate action. What impact does the range of metamagic feats have on the casting time of these spells? As is they only last one round, so if they are extended to full round actions to cast them, does that mean it will last the whole next round?