Huh...<br/><br/>http://www.d20srd.org/srd/skills/concentration.htm<br/><br/>While the description of the Concentration skill does seem to suggest that what Green Knight suggests is a viable strategy, I'd not be inclined ot do it and certainly wouldn't consider it my default method of casting.<br/><br/>If I were narrating an NPCs actions, I'd have to be pretty board to write out every roll like that.  I'd be more focused on interesting narrative and describing what the NPC actually did, not what they might have done had they not failed a roll.  *Shrugs*<br/><br/>Anyways, I'm WAY behind again, aren't I?  For that matter, I don't think I ever caught up...