This is a New Rule that you can use in any Fluxx deck.
It says, "At any point during your turn, you may decide to play no more cards and instead draw as many cards as you have remaining to play. (If Play All, draw as many cards as you hold.)"
This card was originally published in 2010 as a peel-off on a postcard promoting the release of Back To The Future: The Card Game. We stopped selling it when we stopped having the license, but in 2014 we recreated it as a loose card which has no connection or affiliation with the license.