The Aion 2 boss timer you find online comes from the Global client files, not from NC. This page lists the field boss days, the boss list by content type and the weekly kill caps, and marks every row with how sure we are. Rift hours live on the rift timer, not here.
Aion 2 boss timer: field boss spawn days
Client-data 2026-10-14 Source
| Boss | Area | Days | Clock (server time, Wikily) |
|---|---|---|---|
| Executor Argo | Archipelago of Siel's Wings to Siel's Heart | Mon, Thu, Sat | 21:30 |
| Executor Kaira | Sulfur Tree Island to Branding Island | Mon, Thu, Sat | 21:30 |
| Executor Tamasa | Reshanta's Root | Mon, Thu, Sat | 21:30 |
| Guardian Lord Nahma | Reshanta's Root (also Shade Island and Lonely Island spots) | Fri, Sun | 21:00 |
| Watcher Kaira | Black Fragments Area to Abandoned Island | Every day | Every 3 hours from 01:00 |
Client-data 2026-10-14 Source The weekday pattern matches in MetaBot and Wikily, but both read the same client. The clock column is Wikily only.
| Boss | Area | Days |
|---|---|---|
| Enraged Guardian Lord Nahma | Steel Titan's Grave | Fri, Sun |
| Executioner Dramos | Corroded Heart | Mon, Thu, Sat |
| Ravager Marakha | Steel Titan's Grave | Mon, Thu, Sat |
| Turncoat Ducal | Eroded Fragment Area | Mon, Thu, Sat |
Client-data 2026-10-14 Source MetaBot lists these. Wikily's spawn page does not, and we have not confirmed that Middle Reshanta is open on Global.
MetaBot says the exact clock time cannot be verified per region and only that spawns follow the server clock. The community reads that clock as UTC+9, which NC has not confirmed. Until it does, use the countdown in game.
Where the boss sources disagree
Client-data 2026-10-14 Source
| Item | MetaBot says | Wikily says |
|---|---|---|
| Scheduled field bosses | 9 (Lower and Middle Reshanta) | 5 on the spawn page, 7 scheduled out of 56 field-type bosses |
| Middle Reshanta bosses | 4 level 80 bosses listed | None on the spawn page |
| Nightmare bosses | 26 boss ladders | 7 for Season 1 |
| Spawn clock | Weekdays only, hour not verifiable | 21:00 and 21:30 server time |
Client-data 2026-10-14
Wikily also counts 56 field-type bosses on the world map: 8 in Chaotic Lower Reshanta, 24 in Verteron and 24 in Altgard, with the Verteron and Altgard ones at level 45 to 51. Only 7 of them are on a fixed schedule. Timers for the Verteron and Altgard ones are not collected yet.
Abyss boss days and Artifact Siege
Client-data 2026-10-14 Source
The Abyss bosses are the Lower Reshanta field bosses above. Defeating Guardian Lord Nahma once is also a weekly Season Mission that pays Abyss Entry Stones.
The Oct 14 patch added Abyss Entry Stone rewards to the weekly Season Missions Abyss > Weekly > "Spend 1 Hour in the Abyss" and "Defeat the Boss Guardian Lord Nahma Once". It also set the maximum accumulated Abyss entry time to 7 hours. Official 2026-10-14 Source
Artifact Siege in Chaotic Lower Reshanta runs Mon, Thu and Sat at 21:00 server time, with three artifacts. Holding 1, 2 or 3 artifacts raises your faction's Abyss Point gain by 2.5%, 5% or 7.5%. Client-data 2026-10-14 Source
Which faction you meet there depends on server pairing. See the PvP guide for the Abyss rules and the daily and weekly guide for entry time.
Boss list by content type
Client-data 2026-10-14 Source
MetaBot reads 57 bosses from the client, from level 45 to 86. Boss HP and mechanics are not in the client files, so any exact HP number you see elsewhere is an estimate.
| Type | Bosses | Levels |
|---|---|---|
| Boss Challenge (Nightmare) | 26 | 45 to 85 |
| Party Dungeon | 15 | 45 to 86 |
| Field boss | 9 | 65 to 80 |
| Raid | 3 | 75 to 85 |
Client-data 2026-10-14 Source
Party dungeon bosses
Atiel (Deus Research Base), Talisra of the Void (Shattered Arkanis), Transcendent Bakarma (Draupnir), Ultimate Berk (Krao Cave), Divine Auldor (Urugugu Canyon), Ferocious Horn Nuakum, Afflicted Bakarma (Cradle of Nihility, Draupnir), Submerged Emon, Decaying Durvati, Nathara, Awakened Alturadon, Kromede's Desolation, Gargaum (Abyssal Horn Den), Basilus the False and Vakron. See the dungeons guide for how to run them.
Raid bosses
Eternal Ludra (level 75), Terminator Bargott (80) and Kaldrix (85). NC temporarily removed Ludra from the Sanctuary Raid and promised a return date by 16 October, with a First Clear event and a reset Hall of Fame.
NC promised to share the Ludra return date by 16 October. Until then, treat Ludra as unavailable. Official 2026-10-14 Source
Nightmare ladder, hardest boss and kill counts
Client-data 2026-10-14 Source
Each Nightmare boss has up to 10 tiers. Recommended combat power runs from 1,000 to 1,600 at the start (Gatekeeper Pinopi and others, first clear pays 500 to 900 Phantasmal Fragments) up to 4,500 to 4,950 for Ascended Atheron (3,500 to 3,950 fragments).
Layer I opens with Pinopi, Feruk, Fafnir's Poison Blood and Giselle, and ends with Zikel's Apparition. Layer II ends with Kaisinel's Illusion, layer III with Tyrant Tassin and layer IV with Ascended Atheron. Wikily's Season 1 list has 7 bosses: Pinopi, Feruk, Fafnir's Poison Blood, Giselle, Notun, Gerod and Zikel's Apparition.
There is no official difficulty ranking. By recommended power, Ascended Atheron is the hardest Nightmare boss, and by level the raid boss Kaldrix (85) is the highest. Nightmare attempts refill +2 a day at 07:00 UTC and bank up to 14.
| Content | Rewarded final boss kills per week |
|---|---|
| Conquest | 35 |
| Transcendence | 28 |
| Ordeal | 7 |
| Ludra raid | 1 |
| Chalice of Muspel | 2 |
| Corroded Decontamination Facility | 2 |
Client-data 2026-10-14 Source The final boss kill count is a weekly cap on rewarded kills per content type, not a global counter.
NC raised the stats of some bosses on 4 October for the intended five-player party difficulty. Official 2026-10-14 Source
Not confirmed yet
These points have no reliable Global source yet. Do not plan around them.
- The real clock times and time zone of field boss spawns per Global region. UTC+9 server time is a community reading only.
- Drop tables for field bosses. Both MetaBot and Wikily have them, but we have not checked them.
- Whether Ludra and the other raid bosses are open on Global right now.
- Spawn timers for the Verteron and Altgard level 45 field bosses.
- Boss names for Upper Reshanta, and whether Middle and Upper Reshanta are open on Global.
- Boss HP. It is not in the client files.
Related guides and tools
Aion 2 boss timer and boss list FAQ
When do field bosses spawn in Aion 2?
Client readers show Executors Argo, Kaira and Tamasa on Monday, Thursday and Saturday, and Guardian Lord Nahma on Friday and Sunday. Wikily gives 21:30 and 21:00 server time, and Watcher Kaira every 3 hours from 01:00. NC has not confirmed any hour.
Is there an official Aion 2 boss timer?
No. NC has published no field boss schedule, so check the in-game countdown.
What is the hardest boss in Aion 2?
There is no official ranking. By recommended combat power, Ascended Atheron in Nightmare (4,500 to 4,950) is the top ladder step, and by level the raid boss Kaldrix (85) is the highest.
How much HP do Aion 2 bosses have?
Unknown. Boss HP is not in the client files, and any exact number elsewhere is an estimate.
Does Guardian Lord Nahma matter?
Yes. Defeating him once is a weekly Season Mission that rewards Abyss Entry Stones.
How long can I stay in the Abyss?
The Oct 14 patch caps accumulated Abyss entry time at 7 hours. NC did not say if that is per layer or per week.
Does Artifact Siege matter?
It runs Monday, Thursday and Saturday at 21:00 server time per client readers. Holding all three artifacts raises your faction's Abyss Point gain by 7.5%.
What is the final boss kill count?
A weekly cap on rewarded final boss kills per content type, for example 35 for Conquest and 28 for Transcendence.