Jack over at TOTGAD recently reminded me of his cleric spell preparation house rule: the referee chooses half (or all) of a cleric’s prepared spells every day. Here is his original post on gothic character classes. I think that I would like to try out something similar: random spell determination for clerics. This would represent the incomprehensible and mysterious nature of the gods. In terms of game play, this would also differentiate the feel of the cleric from the magic-user even more. Intuition versus reason.
The only downside that I can see is that some players might feel best served by just waiting several days until they get the spells that they want. To make this work in general, strict time records must be kept. But we’re all good Gygaxians, so that’s already a given, right?