Seven mana is a big ask, but in combination with Sun Titan, Karmic Guide, Burnished Hart, Solemn Simulacrum and Fetchlands, you can recur your whole board constantly
Also, I should note that some Sevens recipes are not actually from the Sevens game but are Go Rush-exclusive, you can recognize them by a character's final recipe not ending in "True" (that includes Mimi's only recipe, as her Sevens recipes are from her Goha outfit version)
No noticeable scratches, etc
Like the effects found on effect monster cards, spell cards have different types: Continuous - Active while they're face-up on the field Normal - Single-use cards that go to the graveyard after they resolve Ritual - Used for Ritual summons Equip - Give face-up monsters an additional effect Field - Stay active in the field zone (only one can be active at a time) Quick-play - Can be activated during any phase of your turn, and can be played in an opponent's turn if you 'set' them face-down on your turn first Trap cards Trap cards also trigger unique effects, but you can activate them during your opponent's turn