Magical Hack [Beta Edition] SM179 You can only use this

You can only use this effect of "Number 49: Fortune Tune" once per turn

Set: Structure Deck: The Dark Emperor Card type: Continuous Spell Rarity: Common Attack: 0 Defense: 0 Any monster sent to the Graveyard is removed from play instead

so it is perfect to Duel your way to the top

You can only use the effect of "Mermail Abyssturge" once per turn

Magical Hack [Beta Edition] SM179 You can only use thisSet: Beta Edition Type: Instant Rarity: Rare Cost: {U} Change the text of target spell or permanent by replacing all instances of one basic land type with another. (For example, you may change "swampwalk" to "plainswalk." This effect lasts indefinitely.)