Aster brightened a little, happy to talk about his work. "Well, I kind of started with the idea, at least, that potions made during certain celestial events would have a stronger potency, or different properties. Of course, all I really have to go on is that the full moon is necessary for some. So I started looking at different things. Full moon - not all that rare. 13 a year, right? Major meteor showers, maybe four or five. Planetary conjunctions are fairly common, but the big ones are rare. In August, there'll be the Grand Cross conjunction - It's going to be really quite ridiculous," Aster went on, and starting making motions in the air to punctuate his point. "You'll have Jupiter and Saturn in Taurus, the Moon, Mars, and the asteroid Juno in Scorpio." He kept tracing in the air, his motions forming a square. "Neptune and Uranus in Aquarias, and the Sun, Mercury, Venus and Ceres in Leo." He found one of his charts and pulled it out. "Earth, water, air and fire, and every major planet but Pluto. If something powerful can't happen then, I don't know when it will."