Thoughtseize (Borderless Etched Foil) [Secret Lair Drop Series] Attack Reaction Whenever a Mountain enters the

Whenever a Mountain enters the battlefield under your control

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

Set: Dungeons & Dragons: Adventures in the Forgotten Realms Promos Type: Legendary Creature — Beholder Rarity: Mythic Cost: {4}{U}{B} At the beginning of your upkeep

or [Sakuyamon] in its name

Set: Best of Promos Type: Darkness Rarity: Promo Retreat cost: Colorless

Thoughtseize (Borderless Etched Foil) [Secret Lair Drop Series] Attack Reaction Whenever a Mountain enters theSet: Secret Lair Drop Series Type: Sorcery Rarity: Rare Cost: {B} Target player reveals their hand. You choose a nonland card from it. That player discards that card. You lose 2 life.