Many Gloranthan religions hold that dreams can be two types of experiences. The first is most common – expressions of inner desires, fears, random recollections, and so on. Such dreams may communicate something about the dreamers personal psychology, but rarely more.
The second is rarer – the soul discorporates and travels through the Spirit World or even the Gods Realm until awakened. Some traditions practice lucid dreaming through meditation as a way to enter the Spirit World, but without a guide this can be very dangerous.
It is possible to interact and communicate with spirits and even gods in one’s dreams, however this is dangerous for the untrained! Malevolent spirits and shamans are known to change shape and lie! Recalling dreams can be difficult – and it is entirely possible that the dream is actually of the first type. Nonetheless, many gods speak to their initiates through dreams.
And so of course, dreams are often identified with the Spirit Rune, for the dreamer’s soul is disembodied as they dream.
There is no “god of Dreams” per se, any more than there is a “god of the Spirit World”- but there are many deities associated with dreams. Perhaps they all are.
What about Thella? if you asked just about every Gloranthan outside of the East Isles, they’d answer – who?