Learn the encounter before your next pull. This guide is an original English synthesis of reviewed YouTube captions and official Korean mode rules. Follow the specific difficulty and source version shown below.
Older footage is retained for its encounter explanations; it is not presented as a fresh ten-player clear.
Entry, difficulty & preparation
Assign reactor runners, platform jobs, spirit-clearing directions, bingo search zones and colour sides before the first pull. Keep those jobs distinct from party-number assumptions in older videos.
| Check | What to use |
|---|---|
| Mode covered | Source raid clear |
| Group | 10 players — current Korean Sanctuary |
| Entry requirements | NC lists item level 2,700 for this Sanctuary. Check the live entry panel for the selected difficulty and other admission conditions. |
| Before pulling | Agree assignments, activate available checkpoints, clear pursuing enemies and prepare movement, defensive and stagger skills. |
Evidence: NC · Sanctuary rules ↗ · Madsin · Abyssal Reforging: Ludra ↗
Source version: read before assigning players
The linked encounter footage uses the older four-player party or eight-player raid format. Current Korean parties and Sanctuary raids have expanded. The mechanics below describe that footage; fixed target counts, assignments and HP triggers must be matched to the encounter you enter. Do not copy an eight-slot raid diagram onto a ten-player raid without checking the live markers. Current NC entry and resurrection rules take precedence over old video advice.
Evidence: NC · Sanctuary rules ↗ · Madsin · Abyssal Reforging: Ludra ↗
Fusion Reactor
Assign a mobile reactor team and a backup. This opening is an objective encounter rather than a conventional single-target boss.
| Tell / phase | Your response | Why it matters |
|---|---|---|
| Alternating close / donut / cross attacks | Move through each newly safe area rather than holding one position. | The arena sequence repeatedly changes safe distance. |
| Auxiliary reactors activate | Send assigned players via the jump pads to remove the left, middle or right reactor. | An active auxiliary reactor shields the main objective. |
| Enemy waves | Clear pursuing enemies before committing the whole group to the reactor. | Loose enemies disrupt the jump-pad team. |
Evidence: Madsin · Fusion Reactor · 0:31 ↗
Rahu
The reviewed eight-player split is historical. Assign the current raid roster to the same jobs after reading live target counts.
| Tell / phase | Your response | Why it matters |
|---|---|---|
| Separate platform waves | The assigned platform group clears two waves and activates the available support crystals. | The other group depends on this support while handling the boss. |
| Purple damage-over-time circle | Pass it to another player near the end of its duration. | An unhandled expiry leaves an expanding pool; three pools trigger the source’s enrage. |
| Rear wedge plus targeted line | Bait the line outside, then enter the safe position late in the cast. | Standing behind the boss is not universally safe here. |
| Teleport around 75% | Reunite the scattered players while dodging the rotating attack. | Separated players miss subsequent support and shares. |
| Quartered room around 50% | Choose one safe sector together and place pools along its edge. | Unplanned movement can remove the group’s only shared safe space. |
| Four adds around 25% | Aim the marked lines through the adds. | Missed adds become black pools and contribute to failure. |
Evidence: Madsin · Rahu · 1:27 ↗
Ketu
Avoid old deliberate-death strategies: current NC rules cap boss-encounter resurrections per character.
| Tell / phase | Your response | Why it matters |
|---|---|---|
| Spirits around the room | Clear in assigned directions using rapid hits before the white triangles arrive, then regroup in the central white area. | The source describes spirits requiring two or eight hits; damage magnitude alone is not the check. |
| Eye marker | Look toward the red eye and away from the blue empty eye. | The two eye tells require opposite responses. |
| Blue-orb towers | Jump to intercept the designated orb. | Ground positioning alone does not complete the tower. |
| Red cone / repeated raid damage | Use a crystal’s short protection, then refresh at another as needed. Assign one player per crystal. | Protection lasts only a few seconds; one use does not cover the full sequence. |
Evidence: Madsin · Ketu · 4:53 ↗
Eternal Ludra
Ludra’s detailed source begins in the separate linked video. Save movement for bingo and colour assignments instead of chasing damage during transitions.
| Tell / phase | Your response | Why it matters |
|---|---|---|
| Opening frontal and tail rotation | Tank faces the opening away; everyone avoids the rotating tail. | A stun can prevent the next required movement. |
| Blue and red towers | Jump for blue towers; use the appropriate block or invulnerability for red. Later towers overlap tornadoes, so wait for a usable path. | Tower colour determines the response. |
| Flight and centre blast | Leave the centre, then use the safe gaps between the crossing lanes. | Returning before the crossing sequence ends is unsafe. |
| Bingo floor around 50% and 25% | Search assigned parts of the 36-tile floor with ground attacks. Call the revealed safe tile and converge before the short timer. Jump the later waves. | Unassigned searching duplicates work and leaves tiles unchecked. |
| Late front-only platform | Remain on the playable front side; avoid gap-closing through the boss into the rear void. | A normal rear-positioning habit becomes lethal. |
| Red / blue player colours around 35% and later | Split opposite colours to agreed sides and recheck after reassignment. | Opposite colours near each other create dangerous links. |
| Three ground lines | Wait for a line to resolve, then move into its cleared lane before the remaining floor explodes. | Standing outside every line is not the final safe solution. |
| Late matching circles around 10% | Each player takes a separate circle matching their colour near the cast’s end. | Entering too early can expire the protection; the source’s eight-circle count is historical. |
Evidence: Madsin · Eternal Ludra · 0:14 ↗
Current resurrection & reward rules
NC currently lists ten-player Sanctuary raids. During a boss encounter, each character has two resurrections combined across resurrection skills and spirit stones. The encounter allowance resets on encounter start, boss defeat or a wipe. Ordinary resurrection and kisk resurrection are outside this boss allowance. Do not follow older advice that assumes only one class can revive players. Check the entry panel before the final kill: current Sanctuary reward and re-entry restrictions differ by raid.
Evidence: NC · Sanctuary rules ↗
Tank, healer & DPS assignments
Strategy recommendationSuggested preparation for this encounter. These assignments are editorial recommendations based on the mechanics above.
| Role | Assignment |
|---|---|
| Tank | Keep opening attacks away from the raid and respect Ludra’s late front-only floor. |
| Healer / support | Plan recovery inside safe areas and track current resurrection allowances. |
| DPS | Use rapid hits for spirits, cover bingo zones and check every colour reassignment. |
Evidence: Madsin · Abyssal Reforging: Ludra ↗
After a wipe: fix the cause
Strategy recommendationName the failed mechanic before the next pull. Check whether the target moved too early, the group missed its assignment, or a required cooldown was unavailable. Reassign a backup for any job that can target its original owner. Surviving the mechanic comes before completing a damage rotation.
- Call the next mechanic before the HP threshold; the actual cast may occur later.
- If a hit-count object is involved, use fast direct hits rather than assuming a long damage cooldown is better.
- Save burst for a real vulnerability window after the group has completed its movement.
- Check the current entry panel for loot probabilities and reward availability before spending another run.
Evidence: NC · Sanctuary rules ↗ · Madsin · Abyssal Reforging: Ludra ↗
Sources & research scope
Original English synthesis. Video explanations establish the encounter strategy for the cited version; official Korean pages establish mode, entry and reward rules. Review date: 29 September 2026.
NC · Sanctuary rules ↗
Current Korean rules, read 29 September 2026. Admission and reward rules are separate from the older encounter footage.
Madsin · Abyssal Reforging: Ludra ↗
Source raid clear · historical 4/8-player footage. Reviewed captions; HP triggers are approximate and can be delayed by current actions or stagger. English boss names are lookup labels, not a claim of Global localization.
Madsin · Fusion Reactor · 0:31 ↗
Encounter explanation begins here. Mechanic facts summarized in original English; coordination advice is editorial.
Madsin · Rahu · 1:27 ↗
Encounter explanation begins here. Mechanic facts summarized in original English; coordination advice is editorial.
Madsin · Ketu · 4:53 ↗
Encounter explanation begins here. Mechanic facts summarized in original English; coordination advice is editorial.
Madsin · Eternal Ludra · 0:14 ↗
Encounter explanation begins here. Mechanic facts summarized in original English; coordination advice is editorial.