Final Quest

The dragon drinks, and remains unharmed. You made the right decision!
The king turns to you. "Its your turn to prove your worth," he tells you.
"Leave her out of this!" the green dragon snaps.
"The rules dictate that everyone entering here must complete a task," the king replies without looking at the green dragon. "You know the rules. If you'd wanted to protect her, you shouldn't have brought her here."
"She doesn't know the rules," the green dragon mutters.
"Its all right," you say. "What do I have to do?"
"Fight one of my servants," the king answers.
"All right," you reply.
The king nods to one of the ghosts floating around, and the ghost floats forward so that he is in front of you.
What do you want to do?