From PackRat Recipe Wiki

Twilight Temptation was briefly introduced in the credit markets during the collection release party, but was removed and will be re-introduced in the premium market. Despite rumors to the contrary, Dev Adam has assured players that the card will come back out of the premium markets at a later date. Please see post 15. http://www.facebook.com/topic.php?xid=packrat_general&app_id=2431403991&c_url=http%253A%252F%252Fapps.facebook.com%252Fpackrat%252Fdiscuss&r_url=http%253A%252F%252Fapps.facebook.com%252Fpackrat%252Fdiscuss&sig=2a573c7de7d3d7cce7d8673ad527ac99&topic=65952