» Thu May 10, 2012 6:42 am
When you buy the spell, you are being taught the spell. You are receiving the training. If you want justification, the perks that decrease it's mana cost essentially mean that you've gotten better at that type of magic. But of course you can cast it, you bought it, or read the tome and understood it. But, like in movies where the learning protagonist manages some big and is winded afterward, and their teacher does it easily, you can cast it early, it's just not easy.