There was a time when the only portals I knew were those of the Diablo kind. If you are not exactly a gaming freak, Diablo is an RPG where you get to play as the lone warrior battling the forces of evil. Every once in a while, you use a magic scroll (called the scroll of town portal) to open a dazzling blue gateway. You then run through it to your nearest base and regain your lost health and...
