From the rules:
"Be the first person to give away your cards by matching the same color or shape on the discard pile. Get a Judas card and skip a turn. Get a Devil card and you have to draw another card. Get the Jesus card to help you or someone else win."
Discipleship Junior is a game similar to Uno or Crazy Eights, with a few differences. Each player's cards are kept face-down and are unknown to all players including the owner. They are turned face-up one per turn, and can be discarded if they match the top of the discard pile. Judas cards cause the drawing player to lose his turn. Devil cards "trap" a disciple card, and must be "cast out" by a card matching the trapped disciple. The Jesus card allows each player to discard all face-up cards.