The Black Stone of Legend [LDS1-EN007] Common SM47 You can only activate 1

You can only activate 1 "Mathmech Equation" per turn

If this card is in your GY: You can target 1 "Swordsman Of Doom Lithmus" in your GY

If this card is destroyed and sent to the Graveyard: Destroy as many monsters on the field as possible

that specifically lists the card "Dark Magician" in its text

Set: Fists of the Gadgets Card type: Effect Monster Rarity: Super Rare Attack: 2500 Defense: 1200 To Tribute Summon this card face-up

The Black Stone of Legend [LDS1-EN007] Common SM47 You can only activate 1Set: Legendary Duelists: Season 1 Card type: Effect Monster Rarity: Common Attack: 0 Defense: 0 You can Tribute this card; Special Summon 1 Level 7 or lower "Red Eyes" monster from your Deck, except "Black Dragon's Chick". If this card is in your GY: You can target 1 Level 7 or lower "Red Eyes" monster in your GY, except "Black Dragon's Chick"; shuffle it into the Deck, and if you do, add this card to your hand. You can only use 1 "The Black Stone of