If you control no monsters: Special Summon 1 Level 4 or lower "Melodious" monster from your hand or Deck. You can only activate 1 "1st Movement Solo" per turn. You cannot Special Summon monsters during the turn you activate this card, except "Melodious" monsters.
When there are 3 face-up "7" cards on your side of the field, draw 3 cards from your Deck. Then destroy all "7" cards. When this card is sent directly from the field to your Graveyard, increase your Life Points by 700 points.
Once per turn, you can flip this card into face-down Defense Position. When this card attacks an opponent's face-down Defense Position monster, this card's ATK becomes 2400 during damage calculation only.