Random Arenas/Zaishen Quest

Summary

 * 1) Win 5 battles in Random Arena.
 * 2) *BONUS* Win 5 battles in a row in Random Arena.
 * 3) *BONUS* Win 15 battles in Random Arena.

Dialogue
"Luck will be with you; Balthazar's gaze is upon the Random Arena. Prove your prowess and return to Zehnchu with at least 5 victories to show that there's more than just luck on your side."
 * Accept: "I can do that!"
 * Reject: "No, I'm way too busy today."