Cloud Key [Future Sight] SWSH091 that opponent's monster has its

that opponent's monster has its effects negated during the Battle Phase only

But where is the source

This card must be face-up on the field to activate and to resolve this effect

Set: Raging Tempest Card type: Ritual/Effect Monster Rarity: Super Rare Attack: 1000 Defense: 1000 You can Ritual Summon this card with "Machine Angel Ritual"

Set: Beta Edition Type: Sorcery Rarity: Uncommon Cost: {2}{G} Destroy target land

Cloud Key [Future Sight] SWSH091 that opponent's monster has itsSet: Future Sight Type: Artifact Rarity: Rare Cost: {3} As Cloud Key enters the battlefield, choose artifact, creature, enchantment, instant, or sorcery. Spells you cast of the chosen type cost {1} less to cast. The musical sound of its turning triggers the tumblers of revelation.