- Primary Mechanic: The Abyssus Royal Abyss features three distinct Herald bosses before the final encounter.
- The RNG Problem: By default, runs randomly spawn only one of the three Heralds, leading to duplicate fights.
- The Solution: Activating the Royal Heralds Brine Canister modifier forces all three bosses to spawn sequentially.
- Final Boss Access: Defeating all active Heralds is required to unlock the arena for To'raka, King of the Abyss.
Understanding the Royal Abyss Boss Pool
The final stage of your expedition in Abyssus is the grueling Royal Abyss. Unlike previous acts that feature fixed encounters, this biome utilizes a boss pool system consisting of three unique guardians known as the Heralds. Under standard matchmaking and run parameters, the game selects only one of these three bosses at random per run.
This mechanical design frequently leads to frustrating repetition. Many Brinehunters report fighting the same boss—such as the Primal Chieftain—five or more times consecutively due to bad random number generation (RNG). To complete your achievements, unlock specific weapon blueprints, and master the full combat suite of Abyssus, you must understand who these Heralds are and how to bypass the standard selection system.
The Golem Prototype
- Biome Origin: Depths / Industrial Ruins
- Attack Type: Heavy physical slams and sweeping laser grids
- Strategy: Focus on mobility and jump over ground-level shockwaves
The Primal Chieftain
- Biome Origin: The Gardens / Fungal Overgrowth
- Attack Type: Giant two-sided sword beams and toxic frog projectiles
- Strategy: Keep medium distance to dodge the wide sword sweeps
The Trueborn Champion
- Biome Origin: Sunken Temples / Royal Sanctum
- Attack Type: Massive spear thrusts and storms of homing blades
- Strategy: Dash laterally to avoid the linear spear charges
Relying on standard runs to find all three Heralds is highly inefficient. Run speed, completion times, and difficulty levels do not influence which Herald spawns naturally in the Royal Abyss.
How to Force All 3 Heralds in One Run
If you want to eliminate RNG entirely and guarantee encounters with the Golem Prototype, Primal Chieftain, and Trueborn Champion in a single expedition, you must utilize the Brine Canister modifier system. This system allows players to customize their runs, trading higher difficulty for guaranteed progression and better rewards.
| Modifier Name | Grid Position | In-Game Effect | Practical Purpose |
|---|---|---|---|
| Royal Heralds | Bottom row, 3rd slot | Spawns all 3 Heralds sequentially in the final act | Achievement hunting and blueprint farming |
| Brine Challenge | Variable | Increases enemy health and damage scaling | High-tier currency grinding |
| Loot Tradeoff | Variable | Enhances reward quality at the cost of player debuffs | Completing endgame builds |
Enabling the Royal Heralds modifier turns the final biome into a boss gauntlet. Ensure your weapon mods and elemental blessings are fully optimized before stepping into the arena, as you will not have opportunities to visit shops between these boss fights.
Step-by-Step Modifier Activation Guide
Follow these exact steps to locate and activate the correct modifier in your hub before starting your next descent into the Abyssus Royal Abyss.
Access the Brine Depths Tank
Locate the large cylindrical Brine Depths tank in the center of your expedition hub before launching a run.
Navigate the Modifier Grid
Open the interface and look at the bottom-most row of modifier icons. Move your cursor to the third modifier in that set.
Equip the Royal Heralds Modifier
Select and toggle on the modifier labeled Royal Heralds. This will update your active run parameters.
Launch the Expedition
Confirm your loadout and start the run. When you reach the final stage, the game will bypass standard RNG and queue all three bosses.
Survival Strategies for the Herald Gauntlet
Fighting all three Heralds back-to-back requires a highly defensive build strategy. Because healing resources are scarce during sequential fights, prioritizing shield regeneration and movement speed is critical.
| Boss Phase | Primary Threat | Defensive Counter | Recommended Weapon Mod |
|---|---|---|---|
| Phase 1: Golem | Ground shockwaves and tracking lasers | Double-jump timing and pillar cover | High single-target DPS mods |
| Phase 2: Chieftain | Wide sword sweeps and poison clouds | Dash-through-attack timing | AoE clearing mods for summoned adds |
| Phase 3: Trueborn | Homing blade storms and spear charges | Continuous lateral strafing | Shield-breaking or armor-piercing mods |
Use brine-powered weapons equipped with lightning or freeze elemental blessings. Slowing down the Heralds during their high-mobility phases makes dodging their signature attacks significantly easier.
Endgame Progression Checklist
Track your progress through the deepest layers of the ocean. Use this checklist to ensure you have fully mastered the challenges of the final biome.
Royal Abyss Completion Milestones:
- Locate and activate the Royal Heralds modifier in the Brine Depths tank
- Defeat the Golem Prototype without losing your shield
- Defeat the Primal Chieftain while avoiding all poison clouds
- Defeat the Trueborn Champion to complete the Herald Gauntlet
- Vanquish To'raka, King of the Abyss to finish the expedition
Royal Abyss FAQ
Q: Why do I keep fighting the same frog boss in the Abyssus Royal Abyss?
By default, the game uses a random number generator (RNG) to select only one of the three Heralds per run. If you are seeing the same boss repeatedly, it is simply bad RNG luck.
Q: Does run speed or difficulty affect which Herald spawns naturally?
No. Community testing has confirmed that reaching the final biome quickly (e.g., sub-30 minute runs) has no impact on which of the three bosses spawns.
Q: Where exactly is the modifier to fight all three Heralds?
The modifier is called 'Royal Heralds' and can be found in the Brine Depths tank interface. It is located on the bottom-most row, third modifier from the left.
Q: Do I have to fight the final boss after defeating the three Heralds?
Yes. Once all active Heralds are defeated in your run, the path opens to face the true final boss of the expedition, To'raka, King of the Abyss.