Thoughtseize (Invocation) [Amonkhet Invocations] Plant / Synchro / Effect Set: XY: Black Star Promos

Set: XY: Black Star Promos Type: Fighting Rarity: Promo Retreat cost: Colorless

Set: Unlimited Edition Type: Instant Rarity: Rare Cost: {W} Target spell or permanent becomes white

Set: Dark Revelation Volume 2 Card type: Continuous Spell Rarity: Rare All face-up Level 4 or higher monsters on the field are changed to Defense Position and remain in Defense Position as long as this card is active

but I knew it weren't no ordinary hunk o' rock

Set: Black & White: Plasma Freeze Type: Stadium Rarity: Promo

Thoughtseize (Invocation) [Amonkhet Invocations] Plant / Synchro / Effect Set: XY: Black Star PromosSet: Amonkhet Invocations Type: Sorcery Rarity: Mythic Cost: {B} Target player reveals their hand. You choose a nonland card from it. That player discards that card. You lose 2 life.