I'm running in a C&C campaign that uses the mana system. The GM wants us to still pick our spells for the day, but we can then spend mana to cast any number of each spell. So I might have 6 1st level spells in my book but I can only prepare three per day. But when I use the mana points on my character sheet I don't see any way to also prepare spells. Am I missing something? Or is this something I have to put in myself?