Jace, the Mind Sculptor [Double Masters] Human Druid where X is 6 minus

where X is 6 minus the pitch value of the card revealed this way

Golden treasure

Set: EX: Emerald Type: Water Rarity: Rare Retreat cost: Colorless

Set: Black & White: Next Destinies Type: Psychic Rarity: Secret Rare Retreat cost: Colorless

Set: Box Topper Type: Psychic Rarity: Promo Retreat cost: Colorless

Jace, the Mind Sculptor [Double Masters] Human Druid where X is 6 minusSet: Double Masters Type: Legendary Planeswalker Jace Rarity: Mythic Cost: {2}{U}{U} +2: Look at the top card of target player's library. You may put that card on the bottom of that player's library. 0: Draw three cards, then put two cards from your hand on top of your library in any order. 1: Return target creature to its owner's hand. 12: Exile all cards from target player's library, then that player shuffles their hand into their library.