Card Sets
A complete list of the finished sets can always be found here. That way you'll always know which sets are masterable or not.

Unsorted ::: Yuki x Shuiichi(Gravitation), Touya x Yukito(Card Captor Sakura), Kaworu x Shinji(Evangelion), Sukisho, and DNAngel
Yu Yu Hakusho ::: Hiei x Kurama
Yami no Matsuei ::: Tsuzuki x Hisoka
Saiyuki ::: Sanzo x Goku
Apocripha/0 ::: Platina x Alex
Gundam Wing ::: 3x4, 1x3 & 2x4
Special ::: Adumi