Royal Assassin [International Collectors' Edition] Horror Spirit nonland card revealed this way

nonland card revealed this way and cast it without paying its mana cost

where X is the greatest power among creatures you control

This must be declared when the monster is destroyed

Set: Legendary Collection 5D's Card type: Continuous Trap Rarity: Secret Rare Neither player can Special Summon monsters

Whenever a Dragon you control dies while Boneyard Scourge is in your graveyard

Royal Assassin [International Collectors' Edition] Horror Spirit nonland card revealed this waySet: International Collectors' Edition Type: Creature Human Assassin Rarity: Rare Cost: {1}{B}{B} {T}: Destroy target tapped creature. Trained in the arts of stealth, the royal assassins choose their victims carefully, relying on timing and precision rather than brute force.