(or from Kiya's site
, with description)
You can get a level of the ghost spell (and an item) by choosing the right conversation options when speaking with Patriarch.
Divine Death shakes the screen when triggered, which I found annoying when using a sword with a low level of Deathblow (fortunately it wasn't triggered very often). I've seen Scorch and Lightning Cascade recommended, but didn't use them playing a warrior.
I tried Translocate, but at least over long distances (by the time you moved the screen focus where you wanted in order to cast the spell) it didn't seem significantly faster than just running or using a frog statuette. Divine Eye was interesting, but the wastelands are pretty open, and the opponents there not terribly strong, so there isn't much use for it, IMO.