This card is unaffected by other card effects. Monsters you control gain 500 ATK, and are treated as DARK monsters, in addition to their normal Attribute. This card's controller may use their Spell & Trap Card Zone as an extra Monster Card Zones. Monster Cards summoned in the Spell & Trap Card Zone are still treated as Monster Cards, and can still declare an attack. However, they cannot be declared as an attack target unless their controller's Monster Card Zone is unoccupied.