Wizards Spell components will be used. It will be assumed that under normal circumstances a wizard has all the ordinary components needed. Special components and exceptional components must be bought and kept track of, however. Additionally, unusual circumstances may require normal components to be kept track of. Being interrupted in the writing process can hurt.
Negative factors run the risk of ruining the copy of the spell.
Priests Norse deities will be used. There are also a few others, most notably some from the Celtic pantheon. Demihumans have their own pantheons, of course, though some of them also worship certain Norse gods. There are specialist priests for the various gods, in addition to the general cleric class. There are also priests of the Philosophies of both Good and Evil.