Answer:
Tear me off and scratch my head, what once was red is black instead. What am I?
If you have me you want to share me. If you share me you don't have me. What am I?
A dragon's tooth in a mortal's hand, I kill, I maim, I divide the land.
What goes in the water black and comes out red?
Break me but I’ll continue to work touch me and maybe I’ll stay with you forever.
Long and slinky like a trout, never sings till it's guts come out.