![Mask of Weakness [LON-EN015] Common](http://mediareload.net/cdn/shop/products/ygo_placeholder_a60f7094-501c-4717-b730-ae364dad9390_1024x1024.png?v=1709100381)
![Mask of Weakness [LON-EN015] Common](http://mediareload.net/cdn/shop/products/ygo_placeholder_a60f7094-501c-4717-b730-ae364dad9390_480x480.png?v=1709100381)
| Set: | Labyrinth of Nightmare |
| Card type: | Normal Trap |
| Rarity: | Common |
| Attack: | 0 |
| Defense: | 0 |
This card can only be activated in the Battle Phase. Select 1 attacking monster and decrease the selected monster's ATK by 700 points during the turn this card is activated.