B Rank - The Devourers

[wildkunai]

There have been reports of a sudden 'monster' invasion near our posts on border will Onigakure. From our intelligence we have received the note that this little creatures are called Shinryu San by the Hell ninja's, but because of their never stopping appetite and small bodies with huge mouth on them, we dubbed them All Eaters. They will eat anything, from wood to metal, are sensitive to heat and light. You must hurry, each time they eat they multiple by four additional offspring's. Kill them all before they overrun the continent.

[Travel to Onigakure border outpost]
[Kill two swarms of All Eaters]
[Retreat safely]