I don't know which I like better, your name or your avatar! Hmmm, your name I think. FYI, if the "g" got cut-off by accident, and not on purpose, I can adjust your username if you want.
Magic loop is a how you can do small-diameter circular knitting, with a single large cable needle. You can make the finger of a glove, using a 30 inch circular needle! There's a video on it in the advanced techniques section. ...I don't think I'll ever switch from using my DPN's for small-diameter knitting, but there's something satisfying about owning a set of interchangeable circular needles, that can literally do it all!