Answer:
A dragon's tooth in a mortal's hand, I kill, I maim, I divide the land.
I open wide and tight I shut, Sharp am I and paper-cut fingers too, so do take care, I'm good and bad, so best beware.
I am the yellow hem of the sea's blue skirt.
I make you weak at the worst of all times. I keep you safe, I keep you fine. I make your hands sweat. And your heart grow cold. I visit the weak, but seldom the bold.
What goes in the water red, and comes out black?
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