Utgardloki said:There certainly is no reason in the game rules why a character could not use sorcery, rune magic, and divine magic.
Unfortunately (or fortunately), this is notthe case in the core rule set. In Glorantha, however...
OTOTH, if that last sentence applies, it is then theoretically possible for a rune caster of any cult to try to figure out the secrets of sorcery and make them available to his comrads.
Not usually. You get Rune Magic which is personal and/or folk magic and only ONE otherworld magic. Sorcery, Shamanism, and Divine Magic all draw from separate otherworlds. To use them requires you to commit your soul to that kind of magic. There is very little room to maneuver in this sort of case.
There *are* exceptions but they are rare.
Edit: Simonh is wise. His repy about world views is spot on and only accents the problem with knowing two different systems at any kind of depth. I believe its possible to be laymembers/intitates/students/spiritists of the various systems but to learn anything deeper usually requires abandoning all other kinds of magic except Rune Magic.
Voriof