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Illfang the Kobold Lord is a confirmed floor boss in Echoes of Aincrad, serving as the gatekeeper between Floor 1 and Floor 2.
Role in the Game
As the first floor boss, Illfang is the campaign's first wall-check on the player's mastery of the combat fundamentals: stamina management, sword skill slotting, timed blocks, and timed dodges all come together in the fight.
The Raid Gate Between Floor 1 and Floor 2
Illfang is the raid boss that sits at the top of the Floor 1 labyrinth. Clearing him is the gate that opens the path up through the castle of Aincrad: once his HP bar empties, the staircase to Floor 2 unlocks and, by extension, the rest of the floors above. Until that fight is over, every trapped player is pinned to the starting floor with no way forward.
Because Echoes of Aincrad only covers the first two floors, the Illfang raid is both the campaign's first major escalation and the closest thing the game has to a halfway-point spike. Everything the protagonist has been learning about the combat system up to that moment, stamina discipline, Sword Skill slotting, Switch Mode reads, and partner management, is supposed to get stress-tested by a boss that was built to punish ordinary trapped players in the death game.
The Raid Meeting and Diavel
Just as in the source material, a meeting is organised by Diavel to discuss forming a raid team to take Illfang down. The protagonist and their companions are invited to this meeting alongside the rest of the frontline players gathered in the Town of Beginnings area. The meeting sets up the plan, assigns roles, and is the in-world reason the party ends up pushing into the labyrinth with the other clearers at all.
From that meeting onward the pace of the story shifts. The roughly month-long stretch the party spent weighing their options in the Floor 1 Town of Beginnings gives way to an active push toward the top of the labyrinth, with Illfang as the objective. Iori, Wyzeman, Argo and Zash are all present for that shift as the protagonist's active partners.
Raid Battles as a Format
Raid battles are expected to be the largest battle format in the game. Regular play is built around one player plus a partner. During certain story segments, guest characters step into the fight and the party expands to three. In large-scale battles more guest characters still are said to join on top of that, though the developers have not shared exact numbers for how many combatants a raid group actually fields.
Where Illfang fits in that framework, whether the full raid roster is shown on screen, whether it is abstracted through named guest slots, or whether parts of the fight are handled through cutscene, has not been confirmed. What is confirmed is that raids are the scale above the usual player-plus-partner loop, and that the Illfang fight belongs in that scale.
Is the Protagonist on the Frontline for the Fight?
Direct participation in the first-floor raid has not yet been confirmed. Based on the trailer and the demo footage, there is an opening for the protagonist to be present for at least part of the fight, alongside their partner and the rest of the raid group. The party is clearly preparing for the raid in the material shown so far.
The other plausible outcome is that the story separates the protagonist from the raid group at some point and has Illfang's defeat arrive secondhand through the survivors' accounts. Under that framing the raid would happen off-screen, or be shown in a cutscene with the protagonist absent, and the payoff would be the party's reaction to what they hear afterwards. Either possibility lines up with the footage released so far; the developers have not closed the question.
The Kobold Dungeon and the Tall Kobold Fight
The trailers include a Kobold-themed dungeon and a fight against a tall Kobold on what looks like an isolated platform. Those scenes could be this game's version of the Illfang encounter, or they could be a separate lower-ranked Kobold boss sitting somewhere below the raid. The developers have not confirmed which reading is correct, and both are consistent with the screenshots.
Most of the on-screen Kobold material actually comes from the beta-era flashback segments, which makes it harder to pin any one clip directly to the release-version Illfang fight. On the release timeline, the clearest Kobold encounter shown so far is the isolated-platform fight against a tall Kobold with the protagonist and their partner, which is why it reads as a candidate for Illfang rather than a routine encounter. Until the developers mark a specific scene as the raid, it is safer to treat these clips as belonging to the broader Kobold enemy family, which already includes Kobold Sentinels and Ruin Kobold Troopers, rather than lock them to Illfang's own moveset.
Fallout and the Kirito Question
Part of the resentment that runs through the story is tied to how Kirito handled the Illfang raid in the source material. From the perspective of ordinary trapped players he withheld useful information as an experienced beta tester, and his conduct during and around the Floor 1 boss fight is one of the concrete reasons that view of him takes hold in the early floors.
How Echoes of Aincrad presents the aftermath of this particular raid is therefore key to how the protagonist and their companions end up viewing Kirito. If the party fights alongside him and watches his choices in person, their opinion is formed one way. If they hear about it secondhand from survivors, their opinion is shaped by whoever is telling the story and how that survivor frames his role. Either route feeds directly into the grounded, resentment-coloured take on Kirito that the developers have said this game leans into.