Activate only when your opponent declares an attack while you control an "Amazoness" monster. All monsters your opponent controls are changed to face-up Attack Position (Flip Effects are not activated), and lose 500 ATK as long as they remain face-up on the field. Your opponent must attack with all of their monsters.
Lowers opponent's attack
Forces all monsters opponent controls to battle.
Reveals set cards.
Somewhat difficult activation condition.
decrease of 500 attack might not be enough since amazoness monsters have mostly low attack.