Blue Fire Grenade

Blue Fire Grenades (青火擲弾, Aobitekidan) are a special type of explosive utilized by the Hunter-nin of Kirigakure. The grenade itself consists of a canister filled with Blue Fire Powder with a separate chamber filled with water. After pulling the pin, the water chamber will flood the chamber with the powder after around eight seconds, causing a large explosion, making this tool useful for when a Hunter-nin is severely outnumbered or needs to cause a large amount of damage.

Due to the dangerous nature of Blue Fire Powder the grenades have to be stored in a dry area devoid of moisture or inside scrolls so that they are not set off accidentally by moisture that may accidentally leak in. In addition to this, the grenades themselves have to be handled with extreme caution so that an explosion is not accidentally set off.

Trivia

 * The only person in Kirigakure who is willing to work with Blue Fire Powder is Tanzō, and even then only reluctantly. Because of this, Blue Fire Grenades tend to be in short supply.