Can I learn new spells in play by spending earned CPs?
Not normally. As explained under Adding and Improving Skills and Techniques (p. B292), you can only spend earned CPs on new skills if you tried them at default or adventured with others who were using them constantly. Since spells have no default and are cast too quickly to qualify for “constant” use, you can’t buy totally new spells with earned CPs. Of course, the GM can always make an exception in unusual circumstances: you received on-the-fly tutorial from the world’s best wizard, a god granted you the spells, etc. To spontaneously “learn” new spells, use Wild Talent (p. B99) with the Retention enhancement and Focused, Magical limitation. Add limitations to taste: Accessibility to cover a requirement like “Must see the spell cast at least once,” Preparation Required for a very short period of study, etc. The standard way to acquire new spells is through study. Learn spells like any other skill, but note that Magery reduces the time required; see Learning Magic (p. B235). Calculate t