Mystic Swordsman LV6 [DR3-EN068] Ultra Rare Murders at Karlov Manor Promos You can only activate 1

You can only activate 1 "Pot of Duality" per turn

Set: Southern Islands Type: Psychic Rarity: Promo

except a "Number" monster

You can only use this effect of “Sinister Serpent” once per turn

For as long as that card remains exiled

Mystic Swordsman LV6 [DR3-EN068] Ultra Rare Murders at Karlov Manor Promos You can only activate 1Set: Dark Revelation Volume 3 Card type: Effect Monster Rarity: Ultra Rare Attack: 2300 Defense: 1700 If you Normal Summon this card, you must place it in face down Defense Position. If this card attacks a face down Defense Position monster, destroy the monster immediately with this card's effect without flipping it face up or applying damage calculation. You can return the monster destroyed with this effect to the top of its owner's Deck instead of