Drums are played , not too loud thank goodness... where someone else is working patterns... and another voice says "OKay...good... keep it minor, we don't want to cause enough bad luck to actually hurt anyone.." There are four students her age. A rather eclectic bunch, working with a cauldron? Zara's ability to puzzle things out is much better than before. They're using the power of the 13th, or at least the cover of it, to draw a bit of good luck from everyone all over in order to store it up for later! By casting their net wide, they're getting a big pay out at low cost.