I accomplished a task the necromancer was never able to accomplish.
I like that there's a possibility to fight one of the gods even if I have not tried. You've got quite some content there, the spellbook is furnished with a lot of combinations at the end.
I am happy you chose instant movement, the game plays very smooth. Combining runes is cool, and putting mechanics like an automap behind such a thing always increase both the cool factor of a game and its atmosphere.
The puzzles are fun, combined with the extra pressure or not busting going forward is generally not trivial.
Very cool game, congratulations.