Blind Obedience [Gatecrash] XY152 you can select any number

you can select any number of face-up Spell and Trap Cards

Set: EX: Dragon Frontiers Type: Lightning Rarity: Holo Rare Retreat cost: Colorless

Check your opponent's hand

Set: XY: Base Set Type: Fighting Rarity: Common

except "Gladiator Beast Bestiari"

Blind Obedience [Gatecrash] XY152 you can select any numberSet: Gatecrash Type: Enchantment Rarity: Rare Cost: {1}{W} Extort (Whenever you cast a spell, you may pay {W B}. If you do, each opponent loses 1 life and you gain that much life.) Artifacts and creatures your opponents control enter the battlefield tapped. "By the time your knees have worn through your robe, you may have begun to learn your place."