First of all - hello to all fans of arkham horror
I would greatly appreciate your help regarding spells in arkham - "cast and exhaust" a spell - does it mean that after i have used / tried to use a particular spell, I have to get rid of it (i.e. does the investigator "spend" it and loose it, just like a spent clue token) or do I keep it to be able to use it during following turns, just like I keep my common / unique items?