The rain hit the window edge with the smell of rust, and the splash of dark red spots slowly engulfed the metal window frame. Lin Feng wiped the dagger with a cloth soaked in gun oil, scraping off a thin layer of rusted metal shavings with every push. The M9 military bayonet that had been with him for seven years, the shallow groove on the spine that he had personally ground to break the enemy's bones, began to show ominous orange-red spots on the edge. The rain in the abyss can even digest steel.