The Black Stone of Legend [CORE-EN021] Secret Rare CRU143 The key did not work

The key did not work on a single lock

Set: Crucible of War Edition: 1st Edition Finish: Cold Foil Type: Weapon Subtype: Dagger (1H) Rarity: Rare Class: Ninja Power: 2 Once per Turn Action - [1 Resource]: Attack

instead each opponent sacrifices half the creatures they control

" —Memorial inscription

The Black Stone of Legend [CORE-EN021] Secret Rare CRU143 The key did not workSet: Clash of Rebellions Card type: Effect Monster Rarity: Secret Rare Attack: 0 Defense: 0 You can Tribute this card; Special Summon 1 Level 7 or lower "Red Eyes" monster from your Deck, except "Red Eyes B. Chick". If this card is in your Graveyard: You can target 1 Level 7 or lower "Red Eyes" monster in your Graveyard, except "Red Eyes B. Chick"; shuffle it into the Deck, and if you do, add this card to your hand. You can only use 1 "The Black Stone