A doppelganger with the character's appearance and a doppelganger that has not yet transformed appear. Monsters appear constantly and their number increases over time.
There are a total of 3 main battles, during which the Slaughterer monster will lead the doppelganger. Hunting the Slaughterer monster will give you 3 treasure chests, you can choose one of them. You have to be careful, sometimes monsters hide inside treasure chests instead of loot items. The Slaughterer monster appears randomly, and even if you succeed in hunting the Slaughterer monster, you may not receive a treasure chest.
Ice Walker monsters appear as many as the number of characters entered. If you don't hunt Ice Walkers within 1 minute, the monsters that appear will become stronger.
If the other parties survived the 10 minutes of defense against the monsters, there will be an extra 3 minutes of battle between parties to decide the winner. You must go to the center of the map and battle against the opponents (You can move over to the opponent's zone and attack before the final duel).