I finished my first playthrough and managed to experience a good-ish? ending.
I discovered the nature of magic was to destroy your own soul during casting, so wizards would kill people en masse in order to graft extra souls onto their own for protection (kind of like an eldritch sunscreen). My parents did this to me as a young child killing themselves and all of our family's servants. I wished to stop this sort of thing from happening ever again. I managed to mostly learn spells without scars, except for becoming reviled after learning Promise of Brokenness (oops). I nurtured a bond with my frog familiar and spent 3 focus to gain power. Then when it came time to cast my final greatest spell I had to sacrifice my soothsayer companion for enough power to successfully cast Dark Paradox of Mathematics. This spell changed magic forever so that wizards would now only ever be able to hurt themselves to help others, and never the other way around. With nothing left to accomplish, I said goodbye to froggy friend and left my tower forever with a sense of peace.
So pretty cool game, thanks for making it!