Here is The Nightmare Snake's description in her words like in all her other requests and challenges have.
"THE NIGHTMARE SNAKE.
"he is very powerful he enter your dreams and use your fears to kill you
one time ken was evil and he and claw use him to kill bianca but in the end he was beating by ken grandfather, "and years later ken and bianca have a family and the nightmare snake want to ruin there family and he want revenges. nightmare and khan our brothers"
i only ask you once in awhile when it come to your art