I have crap in my inventory! Whoever answers this riddle first, gets all the crap. "Quote, The Hobbit, J.R.R. Tolkien"
This thing all things devours:
 Birds, beasts, trees, flowers;
 Gnaws iron, bites steel;
 Grinds hard stones to meal;
 Slays king, ruins town,
 And beats high mountain down.