During the weekend, all monsters in the world of Conquer will have the chance to drop the C.O.N.Q.U.E.R. 9 tokens! You can talk to the Weekend Event Envoy (Twin City 439,396) to learn more details and use these tokens to trade for special prizes from Judy (Twin City 452,364)! If you can successfully collect all the 8 letters, there will be some corking prizes for you to pick!
For more details about this event, please visit the quest guide.