There's a Withered Hand card in the GameMastery: Relics of War expansion that will be perfect for Library of Last Resort.
Overall, I'm very pleased with the latest expansion. The Wondrous Items show a lot of creativity and usefulness. Books, Cube, Pearls, Demon Fang, Unicorn Horn, it's all good. If you can afford it, I'd recommend picking up a display box.
If anyone wants a Withered Hand without buying boosters, I'm selling singles and sets on maxminis: http://www.maxminis.com/Forums/tabid/104/forumid/54/postid/685196/view/topi c/Default.aspx (remove the space)
P.S. If I was still in Three Faces of Evil, I'd be tempted to give the players the Shrunken Head card when they find the preserved drow head in the Tunnel. It's not magical, but it's evocative.