There seems to be a bug in the "Summoning the Undead" ritual, my top undead slot has "NaNeNaN" raw mana requirement and I can no longer buy any. Is there a way to change the spell in a slot?
Really fun game, but I'm getting some odd behavior - many of my recipes are showing as ?, but show up when I mouse over them and show up when I click, and some of the quest rewards aren't being stored in my inventory. In particular, the Tier 2 defense "The Raising" claims it rewards 2 Mana Orbs, but I haven't received any (even though I've beaten it several times)
 "Underworld Idle"){kind=icon}
 "Arkandian Crusade"){kind=icon}