to learn spells at a faster rate, however.
upon reaching 4th level, and at every even-numbered sorcerer level after that (6th, 8th, and so on), a sorcerer can choose to learn a new spell in place of one he already knows. in effect, the sorcerer "loses" the old spell in exchange for the new one. the new spell's level must be the same as that of the spell being exchanged, and it must be at least two levels lower than the highest-level sorcerer spell the sorcerer can cast. for instance, upon reaching 4th-level, a sorcerer could trade in a single 0-level spell (two spell levels below the highest-level sorcerer spell he 