Clamp In Wonderland Ex
Many different oneshots published in Newtype Magazine, each involving xxxHOLiC and another CLAMP title. Kindai Mahjong: A short gag "series" that Clamp draws in various magazines. This one came from Kindai Mahjong, a gambling magazine. It features a certain blond bishie from Gohou Drug along with a couple of other characters from xxxHOLiC.