Golden Thief Bug — Monster ID 1086. Sprite reference: Divine Pride.
Golden Thief Bug — Monster ID 1086. Sprite reference: Divine Pride.
| **Teleport** | 1 | Used when the boss cannot properly reach a player |
| 
| **Assumptio** | 5 | Self-buff available while idle or attacking |
| 
| **Shield Reflect** | 10 | Defensive reflect buff |
| 
| **Mammonite** | 22 | Offensive single-target attack |
| 
| **Magnum Break** | 25 | Close-range area attack |
| 
| **Fire Ball** | 93 | Conditional response to Fire Wall |
| 
| **Guided Attack** | 5 | Periodic targeted attack |
| 
| **Summon Slave** | 10 | Replenishes accompanying monsters |
| 
| **Hiding** | 1 | Can activate at low HP |
| 
| **Heal** | 11 | Can be used while Hiding |
The custom instance adds its own mechanics on top of these native monster skills.
***
## Special Mechanics
### Gilded Impale
Golden Thief Bug selects one living player and marks them with:
> `The gilded sovereign fixes its gaze upon thee.`
The target receives a visible marker and has approximately **1.8 seconds** before the strike lands.
Base damage before party scaling:
| Phase | HP Damage |
| ----------- | --------: |
| **Normal** | 18% |
| **Enraged** | 22% |
The hit also applies:
> **Stun — 2 seconds**
The targeting routine preferentially selects several caster and support jobs when available, otherwise it falls back to another living player.
{% hint style="warning" %}
Gilded Impale uses HP-percentage damage and is additionally modified by the encounter's Script Damage Rate.
{% endhint %}
***
### Locust Swarm
The boss announces:
> `A gilded swarm erupts from beneath the hollow shell. Flee from the sovereign!`
Locust Swarm creates repeated damage around Golden Thief Bug.
| Property | Normal | Enraged |
| ------------------------ | ------: | ------: |
| **Radius** | 7 cells | 9 cells |
| **Ticks** | 8 | 10 |
| **Base Damage per Tick** | 7% HP | 10% HP |
| **Tick Interval** | 1 sec | 1 sec |
Players caught inside also receive:
* **Silence — 3 seconds**
* **Decrease AGI — 3 seconds**
After Locust Swarm finishes, the encounter immediately triggers a **Brood Guardian**.
***
### Brood Guardian
A Brood Guardian spawns near Golden Thief Bug.
| Property | Normal | Enraged |
| --------- | ----------: | ----------: |
| **Level** | 200 | 200 |
| **HP** | 180,000 | 260,000 |
| **ATK** | 2,500–6,500 | 3,500–8,000 |
| **HIT** | 250 | 250 |
When the Brood Guardian dies:
> **Corpse Scarabs are spawned.**
***
### Corpse Scarabs
Corpse Scarabs are summoned around Golden Thief Bug.
| Phase | Amount | HP Each | ATK |
| -------------- | -----: | ------: | ----------: |
| **Normal** | 5 | 45,000 | 1,200–3,200 |
| **Enraged** | 8 | 70,000 | 1,700–4,100 |
| **Last Stand** | 10 | 70,000 | 1,700–4,100 |
During **Last Stand**, an additional Corpse Scarab wave is triggered every **18–25 seconds**.
***
## Phase Changes
### Phase 1 — Above 35%
Golden Thief Bug uses the standard versions of:
* Gilded Impale.
* Brood Guardian.
* Locust Swarm.
Approximate initial mechanic timers:
| Mechanic | Initial Interval |
| ------------------ | ---------------- |
| **Gilded Impale** | 14–18 sec |
| **Brood Guardian** | 35–45 sec |
| **Locust Swarm** | 85–110 sec |
***
### Enrage — 35% HP
At **35% HP or lower**:
> `The gilded shell splits. The brood answers in frenzy!`
The boss casts another `NPC_POWERUP` and enters Enrage.
Changes include:
* Stronger Gilded Impale.
* Larger and stronger Locust Swarm.
* Stronger Brood Guardians.
* More Corpse Scarabs.
* Shorter mechanic cooldowns.
Enraged cooldown ranges:
| Mechanic | Cooldown |
| ------------------ | --------- |
| **Gilded Impale** | 12–16 sec |
| **Brood Guardian** | 30–40 sec |
| **Locust Swarm** | 70–90 sec |
***
### Last Stand — 15% HP
At **15% HP or lower**:
> `The false sovereign casts aside all restraint.`
The boss casts `NPC_POWERUP` again.
The main addition is continuous **Corpse Scarab pressure**, with new waves appearing every **18–25 seconds** until the fight ends.
***
## Wipe Condition
The encounter continuously checks whether any living players remain inside the instance.
If everyone is defeated:
> `The swarm consumes all who remain.`
The encounter then:
1. Marks the trial as failed.
2. Removes remaining monsters.
3. Warps the group to `prontera (156,180)`.
4. Destroys the instance.
***
## Victory and Rewards
When Golden Thief Bug is defeated, all remaining monsters are removed and **GTB Rest** becomes available.
Current rewards applied by the script:
| Role | Reward |
| ---------------- | ----------------------------------------- |
| **Solo** | 60,000 Zeny + 1 boss soul item (`150000`) |
| **Party Leader** | 80,000 Zeny + 1 boss soul item (`150000`) |
| **Party Member** | 35,000 Zeny |
{% hint style="warning" %}
The current party reward text shown in-game is outdated.
The script **adds 80,000 / 35,000 Zeny**, while the displayed messages still say **60,000 / 20,000**.
{% endhint %}
Resting at **GTB Rest** can also unlock the corresponding Bonfire destination when the eligible character has not completed it before.
***
## Quick Guide
1. Enter the Golden Thief Bug Trial from `prt_sewb3 (20,185)`.
2. Spread when **Gilded Impale** marks a player.
3. Move away from the boss during **Locust Swarm**.
4. Kill **Brood Guardians** and control the resulting Corpse Scarabs.
5. Expect stronger mechanics below **35% HP**.
6. Prepare for continuous Scarab waves below **15% HP**.
7. Defeat Golden Thief Bug before the party is wiped.
***
## Related Guides
| Instance Overview | Review how EldenRO's custom MVP instances work. | |
| Eddga | Continue with the next custom MVP encounter. | |
| Bonfires | Learn how post-boss Bonfires and travel unlocks work. |