The third instalment of Dark Worlds Gaming Society's mini gaming con Necrognomecon is planned for Sunday 28 October. For my first time there (and first time GMing in PSOP!) I'll be running the First Steps scenario, for 1st level characters. If you're interested, check out the event page.
In general, which deity, if any, responds to a miracle cast from a scroll, or a staff?
The spell's description says it's "your deity (or the power you pray to for spells)". In the case of a magic item, does "you" mean the creator or the user? Even if it's normally the user, I can imagine clerics, especially evil and chaotic ones, selling mostly scrolls of miracle that are cursed so as to always make the request of their deity. Lawful and good clerics in particular may generally refuse to sell such (non-cursed) scrolls at all, in case they are used for chaotic/evil purposes.
What if you get divine spells but aren't devoted to any particular power and don't pray to them for spells, e.g. you're a druid of the Green Faith (a non-theistic religion), or an oracle or paladin of no particular deity? What if you're an atheist who doesn't cast spells?
Here are a few specific scenarios to consider. Assume that non-clerics have ranks in Use Magic Device and pass their UMD check to use the scroll. Try also with "staff is crafted" instead of "scroll is written", etc.
The scroll is written by a cleric of one deity and used by a cleric of an allied deity (e.g. Sarenrae and Cayden Cailean).
The scroll is written by a cleric of one deity and used by a cleric of a hostile deity (e.g. Asmodeus and Cayden Cailean).
The scroll is written by a cleric of one deity and used by a non-cleric (e.g. a rogue) who worships the same deity.
The scroll is written by a cleric of one deity and used by a non-cleric who worships a hostile deity.