Cards to Save the Timeline

Cards to Save the Timeline is a card game created by Ray Palmer to act as an exercise for the Legends to learn from their previous mistakes on missions.

History
After Sara left Ray as interim captain of the Waverider, he introduced the game to Constantine and Charlie. However, they convinced him to go on a mission instead, rather than playing the game.

Behind the scenes

 * Cards to Save the Timeline is a parody of Cards Against Humanity, a party game in which statements given on a black card are either filled in or answered using words or phrases given on white cards, typically deemed as offensive or off-color.
 * Considering the nature of the game, various cards make reference to events in prior episodes:
 * Nate Heywood piloting the Waverider while high on hallucinogens in.
 * John Noble's appearance in.
 * Grodd's appearances in and.
 * One of the cards features Damien Darhk on its flip side; he was a major villain in the third season.