The Khione Staff can be upgraded into the Eternal Khione's Staff at the Upgrade Chest beside the ::upgrade teleport, with a difficulty rating of easy.
The benefit of upgrading Khione's Staff into the Eternal Khione's Staff is that you no longer need to charge the staff in order to benefit from its special effect. The special effect gives the staff a 1 in 10 chance of dealing twice your max hit in damage to your main target.
Currently, it is not dropped by any bosses.
It can currently be obtained from the following Box:
At the moment, the price of Eternal Khione`s Staff is roughly: 20-30M DScoins