Chrononauts: Beatles Reunion Album Promo Card (2001)

Can be added to Chrononauts or Early American Chrononauts.

Text says:
"The card can not be played or stolen unless flipped.
If not flipped, a Beatles Reunion CD in play may be substituted for any one artifact listed on your mission"

Originally included in Fluxx Blanxx, but was added to the original game version 1.4. It was also available by itself from Looney Labs webstore