It’s time for an economic depression.

RD/KP06-JP016 恐攻竜ストックバスター Kyoukouryuu Stock Buster (Stock Buster the Terrorstriking Dragon)
Level 7 DARK Dragon-Type Effect Monster
ATK 2400
DEF 1600
[Requirement] If your opponent controls 5 or more cards, you can activate this by sending 1 card from your hand to the Graveyard.
[Effect] All face-up monsters (Level 7 or lower) your opponent controls lose 1500 ATK until the end of this turn.