Not enough PKing for you? Try the player killing class war, available once per week for each character class. You can roll out your uber-character against your peers, in a same-class battle royal.

NPCs: There are two NPCs that you need to know about.
ClassPKEnvoy (Class Player Killer War Chief, Twin City 436 241)
ClassPKEscort (Class Player Killer War Clerk, in the PK map)

Rewards: Experience worth 5 Exp Balls

i. Talk to ClassPKEnvoy and ask about the Class PK war. He can be found at (Twin City, 436 241). You'll find that every day is a contest for a different class.

ii. On the right day, wait till PK round is beginning. Don't worry if you miss the first PK War round because there are 2 rounds every day! Here are the times for the war:

Round 1: Afternoon 2pm (server time)
Round 2: Night 10pm (server time)

iii. Talk to the Envoy 15 minutes before the contest starts.

Note: Fire Taoists and Water Taoist will have the Class PK War at the same day, but they will be sent to different maps. That is, Water Taoists will fight Water Taoists while Fire Taoists will fight Fire Taoists.

3 groups in each round:

Level 60 or below
Level 61 to 90
Level 91 or above

There will be a winner in each group!

iv. You will be teleported to a map where you must PK all the other contestants who entered the competition. If you want to leave, just talk to the ClassPKEscort.

v. Fight until the contest is over.

A reward of experience equal to 5 ExpBalls can only be claimed at ClassPKEscort once the other contestants have been knocked out.

If there is no clear victor, all will be sent to Twin City when the event ends.

If you win the PK war nearly 3pm or 11pm, please hurry up to claim your reward, in case that you will be sent to Twin City without getting anything.