I am the DM for Aereas. He asked if I would let him take levels of Dweomer Keeper (from the Complete Divine web enhancement).
I told him I would allow him to take levels in it providing he took 3 levels of a divine casting class and 3 levels of an arcane casting class. I had not seen or known of this PrC before he asked about it and I made the requirement regarding spellcasting similar in scope to that required by the Mystic Theurge PrC (which also requires three levels in arcane and divine spellcasting classes). Considering it was an unknown PrC to me until this point, I thought that was being generous allowing him to bring an untested PrC into my campaign where he could take up to half of his character levels in the PrC.
The earliest he could take the class with the requirements written as is (simply the ability to cast arcane and divine spells) would be level 5 (also need 8 ranks in Spellcraft and Knowledge--Arcana). With my decision, it only postpones him taking the class for 1 level. Since he would be playing a 12th level character in my game, going by my judgment on the issue, he would still be able to have 6 of the 10 levels in that prestige class.
I am standing by my decision, but I am here checking out this thread at Aereas' request. The only other names here I recognize is Thanee and Hypersmurf and its good to post with you guys again--I've been away from here too long. Hello to the rest of you that I've never posted with (or don't remember, sorry if that's the case).
Now, first off, Aereas misspoke. Not once did I dispute that the spell prepared and cast after casting Anyspell is arcane, it is, but it is powered by Divine magic. It is very specific in the description that the spell being cast has its DC set by the Cleric's Wisdom modifier, not Intelligence and the Cleric must have a Wisdom (not Intelligence) score of 10 + the arcane spell's level to be able to cast it. And it requires a Divine Focus in place of whatever the non-valuable material components of the arcane spell. Yes, the spell works just as though cast by a wizard of the cleric's level, but the spell is powered by Divine magic. If it wasn't, its DC would be determined by Intelligence and would have actual material components not a Divine Focus as a requirement. Arcane spells do not have or require Divine Focuses.
That's my take on it. I'm not going to defend myself against anyone that happens to disagree. I don't need to. I'm the DM of the game in question and I made my judgement regarding that prestige class and I stand by it. I knew Aereas was using that spell to bypass a legitimate requirement and in the post preceeding this, he admits it. I don't mind if players get creative trying to meet or exceed requirements, but getting around them, bypassing them or whatever else is just plain lazy, is practically cheating and something I have no patience for. When considering the PrC, I looked not only at the requirements, but also considered the intent and purpose of the PrC and do not feel I was off base by changing the requirement from "Ability to cast arcane and divine spells" to "having 3 levels of arcane and divine spellcasting classes".
Lastly, this just came to mind, another reason why I won't let Anyspell suffice and that is because I will not allow casting a spell to meet a requirement for a prestige class--unless it is something specific like being able to cast Animate Dead for the True Necromancer. In this case, that is only a conditional solution to a nonconditional situation. If that were allowed or encouraged, any Wizard that cared to do so, for example, could meet the BAB requirements for most fighter-type prestige classes just by casting Tenser's Transformation which sets the Wizards BAB as equal to his character level or anyone could beat any requirement with the right spell cast or magic item used.