SoulWorker Halloween event is going to trick or treat you

Starting today and running through November 8, the SoulWorker Halloween event will task you with collecting small metal pieces, coins that will make spooky pumpkin heads grin uncontrollably.

These coins are naturally used to purchase skins, costumes and decorations. To earn them you need to complete up to seven event quests each day. Until the end of October you can use these coins to produce the following items: Halloween weapon skins, Yin Yang Costume, Halloween decorations and an Event title. Or if you don't want these, you can sell the Halloween Coins to an NPC in exchange of 50,000 dzenai.

Here is the Yin Yang Costume that you can purchase if you complete these events.