Sounds good but is this like lets say final fantasy where you have to watch the summon creature (or lightning)like a clip? but re-reading it now reminds me of FF7 with the gems (materia or what ever its called) effect. For those who do not care to play ff7 to understand, you get gems and they like your characters with experiance points, they hold one spell that gain exp over time then you gain levels and it grow stronger.
Like i said i could be wrong and you meant getting spells from certain quests/mobs and classic write in your spell book.
personaly i like lightning to be an area effect like in diablo, when i was a lil lad my mage had a lot of time casting it, it like a tide of lightning but sort of zig zags until it hit it target.