[Serak Moonblade]

i began playing BG2 recently and have with me a particular walkthrough given to me by a friend. this walkthrough mentions beginning the game with a fighter mage and adding minor spell sequencer in on of the 4th lvl mage spell slots. but during character generation i have only upto lvl 3 mage spells. is the minor spell sequencer available anywhere in BG2? what about other spell sequencers? the earlier i can come across one, the better.