Dungeon Fighter Online’s Sky of a Thousand Seas update adds new region, dungeons, and Oaths gear

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Dungeon Fighter Online’s new season update, Sky of a Thousand Seas, is live now. The update sends players to a new region tied to Seon, continues the fight against Vanitas, and adds a fresh set of progression systems, dungeons, events, and character catch-up tools.

Neople has a fuller breakdown on the update page, but the big shift is the arrival of Oaths, a new equipment system replacing Fusion Stones as the season’s core gear path. It includes duplicate protection and an Oath Crystal Collection system, where players can dismantle Oath Crystals, collect currency, and trade for a crystal they want.

  • Sky of a Thousand Seas adds a new region and story content centered on Myre, new allies, and the Vanitas threat.
  • The new Hell Party dungeon is Endkeeper of Order.
  • Two new Advanced Dungeons are available: Grand Constellation Turtle Library and Castle of the Apostate.
  • Advanced Dungeon clears can reward Oaths, Oath Crystals, and Doom Oracles.
  • The Labyrinth of Paradox Special Dungeon adds account-wide benefits, including Subjugation Tickets for earning Daily and Advanced Dungeon rewards with one click.
  • The Mercenary Group system lets players dispatch or hire Buffer characters for dungeon runs and gives extra Labyrinth exploration benefits based on group level.

The update also brings some quality-of-life additions. Skill Chain lets players bind multiple skills to one key, while Arad Odyssey is aimed at helping newly created characters get up to speed faster.

Several limited-time events are running alongside the launch. Players can redeem the coupon code 2026-THOU-SAND-SEAS for items including Rare Clone Avatars, Platinum Emblems, and Gold Emblems. A seven-day login event also offers rewards such as up to 7,000 Doom Oracles, Rare Avatar Selection Boxes, Primeval Accessory Selection Boxes, and a +13 Weapon Reinforcement Ticket.

The returning Boost Up event gives players another faster progression route, while Oracle’s Epic Equipment Module Research lets players earn Battery Packs from Sky of a Thousand Seas or Sunken Depths dungeons, then use them toward Epic Set Equipment modules.

Season 10 Act 1. Sky of a Thousand Seas