Thief of Sanity [Guilds of Ravnica] 116a You can only use each

You can only use each effect of "The Iris Swordsoul" once per turn

You cannot Special Summon monsters during the turn you activate this card

you can destroy cards your opponent controls up to the number shuffled

Set: EX: Unseen Forces Type: Fire Rarity: Ultra Rare Retreat cost: Colorless

Set: Sword & Shield: Fusion Strike Type: Psychic Rarity: Ultra Rare Retreat cost: 0

Thief of Sanity [Guilds of Ravnica] 116a You can only use eachSet: Guilds of Ravnica Type: Creature Specter Rarity: Rare Cost: {1}{U}{B} Flying Whenever Thief of Sanity deals combat damage to a player, look at the top three cards of that player's library, exile one of them face down, then put the rest into their graveyard. You may look at and cast that card for as long as it remains exiled, and you may spend mana as though it were mana of any type to cast that spell.