Blast Mask

The Blast Mask is one of the twenty-four masks Link can collect in The Legend of Zelda: Majora's Mask. If the mask is used, an explosion will occur causing the same effect as if Link had used a bomb. It can be especially useful if Link needs a bomb quickly, but has none in his inventory.

The downside to using the mask is that it does damage to Link every time he uses it. However, if Link uses his shield while using the mask then he will take no damage. Once the mask has exploded, it will become transparent and unusable for a short while or until Link leaves the current room..

Obtaining the Mask
The Blast Mask is one of many items Link receives for completing entries in the Bombers' Notebook. Link will receive it after he completes the entry for the Old Lady from the Bomb Shop. Fortunately, her entry is the shortest in the entire notebook and it can be completed immediately after Link has been returned to his true form.

Visit North Clock Town on the night of the First Day. At midnight, the Old Lady from the Bomb Shop will enter town. At about 12:20, the thief, Sakon, will appear from behind the slide and steal her bag of Big Bomb Bags. Attack Sakon to make him drop the bag and prance around before leaving the scene. After Sakon has left, the Old Lady from the Bomb Shop will reward Link with the Blast Mask.