Clearly, we're in need of a night vision spell.
Also, Putesco gets "stuck": I have to cast Igni to un-stick it (I'm not certain if specifically Igni is needed, or if any spell, or certain spells).
But separately, I haven't been able to figure out the use of several existing spells: Alius Robur, Contego Magicus, and Impedare.
Any ideas? I can see no evidence of any of these actually *doing* anything.