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.
Mechanic instructions follow the cited gameplay explanation. HP percentages identify approximate phase triggers, not a guaranteed attack timeline.
Entry, difficulty & preparation
Set primary and backup interceptors before the last boss. Keep a short call for share, spread and fear because they follow closely.
| Check | What to use |
|---|---|
| Mode covered | Stage 4 |
| Group | Up to 5 — current Korean party format |
| Entry requirements | Select this dungeon and difficulty in the entry panel. Check character level, item level, minimum party size and remaining entries there. The reviewed mechanic videos do not establish a current numeric admission threshold. |
| Before pulling | Agree assignments, activate available checkpoints, clear pursuing enemies and prepare movement, defensive and stagger skills. |
Evidence: NC · Transcendence rules ↗ · Games On · Abyssal Horn Den ↗
Kapu
Plan an outer collection lane and do not let ordinary attacks create unnecessary fear clones.
| Tell / phase | Your response | Why it matters |
|---|---|---|
| Small blue orbs | Collect or clear the orbs along the side before they detonate. | Leaving them narrows the safe area and adds slowing pressure. |
| Repeated boss hits | Avoid building the source’s four-hit fear-clone stack. | Fear during another mechanic removes control of your position. |
Evidence: Games On · Kapu · 0:10 ↗
Dhakan
Arrive for the share, then react to the overlaid floor tells. Do not treat the pool as permission to stand still.
| Tell / phase | Your response | Why it matters |
|---|---|---|
| Soul-buff altar and adds | Kill the assigned adds before their effect heals the boss. | Ignoring them reverses damage progress. |
| Bound player in a pool | Join the five-player share shown in the source while stepping out of overhead circles. | Sharing does not make the separate circle attacks safe. |
| Central pull and lightning | Leave the centre promptly after the pull. | Remaining to finish a cast adds repeated damage. |
Evidence: Games On · Dhakan · 1:38 ↗
Gargaum
The source demonstrates a five-player Stage 4 clear. Use that context rather than importing Ferocious Horn Expedition assignments.
| Tell / phase | Your response | Why it matters |
|---|---|---|
| Permanent Stage 4 clone | Track both boss and clone. Assign separate projectile interceptors with backups. | Protecting the target from only one attacker is insufficient. |
| Bound target and incoming projectiles | Intercept the boss projectile and the clone projectile, then resolve the stack/spread marker that follows. | The interception is only the first part of the sequence. |
| Fear blast after a share | Move out immediately when the share resolves. | Remaining stacked allows fear to disrupt several players. |
| Black-hole phase | Share the marked hit beside the hole so its follow-up explosion damages the hole. The reviewed solution repeats three times. | This is not the same black-hole instruction as the Expedition version. |
| Black-hole positioning | Keep the party on the opposite side of the hole from the boss and maintain the interception plan. | Poor geometry makes the explosion miss or exposes the stack to the next hit. |
Evidence: Games On · Gargaum · 3:35 ↗
Tank, healer & DPS assignments
Strategy recommendationSuggested preparation for this encounter. These assignments are editorial recommendations based on the mechanics above.
| Role | Assignment |
|---|---|
| Tank | Control boss facing while also watching the permanent clone. |
| Healer / support | Prepare burst recovery for shares and avoid fear stacks. |
| DPS | Handle adds, cover both projectile lanes and place all three black-hole explosions. |
Evidence: Games On · Abyssal Horn Den ↗
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 · Transcendence rules ↗ · Games On · Abyssal Horn Den ↗
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 · Transcendence rules ↗
Current Korean rules, read 29 September 2026. Admission and reward rules are separate from the older encounter footage.
Games On · Abyssal Horn Den ↗
Stage 4 · source encounter rules. 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.
Games On · Kapu · 0:10 ↗
Encounter explanation begins here. Mechanic facts summarized in original English; coordination advice is editorial.
Games On · Dhakan · 1:38 ↗
Encounter explanation begins here. Mechanic facts summarized in original English; coordination advice is editorial.
Games On · Gargaum · 3:35 ↗
Encounter explanation begins here. Mechanic facts summarized in original English; coordination advice is editorial.