For AION 2 Global on Steam/PURPLE. The Halloween event introduced after October 13 (PDT) / October 14 (CEST) maintenance runs until the November 3 (PST) / November 4 (CET) maintenance. Korea and Taiwan have their own event calendars.
The 14-day attendance track
Open Attendance → Trick or Treat to collect Halloween Pumpkin Coins. Most days provide 35 coins; the larger milestones on days 7 and 14 each award 100. Claim the rewards in the client rather than assuming that the entire calendar is automatically delivered.
Missions tied to regular gameplay
Under Season Mission → Event, weekly objectives reward additional coins. They cover ten Abyss monster kills, Expedition Conquest, Transcendence, Ascension Trial and Nightmare clears, plus login, Unique gear, scrolls, Dimensional Invasion and Shugo Festival tasks. Individual objectives grant 20, 25 or 30 coins.
What to buy
The special merchant appears in designated Verteron and Altgard towns. A 250-coin Special Halloween Chest includes a skeleton breastplate skin and 10,000 Pet Soul Crystals, and is limited to once per server from level 10.
Other options include Odyle Energy for 10 coins, Lower Abyss Rift Stones for 30, and Daily Dungeon Instant Clear Tickets for 3, subject to level requirements and weekly caps. Check the in-game store before buying.
Expedition and Transcendence runs also award Candy Key Fragments. Crafting a Red, Yellow or Blue Candy Key requires 60 fragments, with weekly limits. These fragments are a separate event mechanism, not interchangeable with Pumpkin Coins.
The cosmetic packs sold separately in the shop are paid promotions, not part of the free attendance rewards.
Source: NC Global patch notes.
Independent coverage, not an official NC bulletin.