The Dink Network

I've gotten to the wizard's chambers and he's asked me to get some parchment in order to get the magic, but I can't figure out what he's talking about. If I walk through the walls of his chamber I just end up in the black space around all the houses in the game. Even after his house is on fire and he's technically gone, he's still in his chamber, but I can't talk to him or anything. I have the scroll for fireball magic and just need him to teach me--what am I doing wrong?