Veles, the Slavic god of the dead, wisdom and magick - also of the earth and cattle.
The cattle part is interesting, because initially it was about all possible cattle - think spiritual cattle.
Somewhat of a metaphor for spirituality, I believe, but eventually it got lessened to just earthly cattle.
Since he is a god of cattle, he is also thought to be a god of physical wealth - since cattle was considered a great treasure.
He is also the god of “volhov”, which are basically magickians - they go into deep trances (sometimes donning the furs of bears and wolves, cuz why not) and cast crazy ass spells.
An interesting ritual that might get his attention is leaving some freshly cut (or, yknow, ripped) grass and leaving it on a pressurized wheat field. This was something of a ritual they used to do, as a sign of respect to Veles.
I imagine you would be able to learn something interesting from him.