Slifer the Sky Dragon [JMPS-EN005] Ultra Rare Dark Cards in Mystery Booster have

Cards in Mystery Booster have the original set symbols and numbering of one of their printings

Desperate Ritual

1 Boneyard Lurker

Enchantment (7)

• 2 Courageous Steelhand (1)

Slifer the Sky Dragon [JMPS-EN005] Ultra Rare Dark Cards in Mystery Booster haveSet: Shonen Jump Magazine Promos Card type: Effect Monster Rarity: Ultra Rare Attack: ? Defense: ? Requires 3 Tributes to Normal Summon (cannot be Normal Set). This card's Normal Summon cannot be negated. When Normal Summoned, cards and effects cannot be activated. During the End Phase, if this card was Special Summoned: Send it to the Graveyard. This card gains 1000 ATK and DEF for each card in your hand. When a monster(s) is Normal or Special