All Bosses and How to Beat Them in Once Human

The Stardust apocalypse has changed everything in Once Human – from humans to animals and plants. The constant contamination has given rise to horrifying creatures, called the Great Ones. The Great Ones are powerful entities, fueled by Stardust energy, that control specific areas of the map and have extraordinary powers.

As a Meta-Human, it is your duty to seek out these creatures, defeat them, and restore balance to the world. Read on to learn more about all the bosses in Once Human.

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All Bosses in Once Human

There are five main story bosses in Once Human, each belonging to a region of Nalcott. These bosses have their own unique mechanics and require specific strategies to defeat them. Here’s a brief overview of the five Great Ones in Once Human.

Ravenous Hunter

Required Level	10
Where to Find	Monolith of Greed in Dayton Wetlands

The Ravenous Hunter, previously known as the Foul Shadow Hunter, is an early game boss in Once Human. This robot-like creature has a human host trapped within a yellow sac on its head. Even though it looks easy to kill, this boss fight has multiple stages.

To defeat the Ravenous Hunter, you first need to break its Gatling gun. This weapon acts like a shield around the Hunter, so you can’t really attack him unless he drops it. Once the gun is destroyed, the Hunter will enter a Rocket barrage phase, where he directly launches rockets at you. In this case, stay mobile and seek cover. Find openings to attack the Hunter while evading his rockets and aim for the head to inflict maximum damage.

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Treant

Required Level	20
Where to Find	Gaia Cliff Monolith in Broken Delta

The Treant is a massive, plant-like creature born from the body of a human and is protected by a shield of invincibility. The first thing you need to do in this boss fight is to destroy the three vines with glowing weak red spots to remove the Treant’s invincibility. Once the shield is down, you can start attacking Treant.

To defeat Treant, target its horned head or, more effectively, the female human on its back. The humanoid is the Treant's true weak point, and targeting her is the key to victory. However, she can often wail in pain and cause damage to everyone around her.

The Treant also shakes its body to release flying fluffs that chase you down and deal damage. These fluffs must be destroyed before they connect to avoid taking harm. Use the rock formations in the area to take cover and constantly move around to avoid the Treant’s attacks.

Arachsiam

Required Level	30
Where to Find	Mirage Monolith in Iron River

The Arachsiam is a terrifying creature that resembles a spider-like creature, capable of weaving intricate cobwebs while spawning numerous offspring. One of Arachsiam's most unsettling abilities is her ability to cocoon players in a web and ultimately incapacitate them. This attack is difficult to avoid, but you can spot it coming by observing the Arachsiam's body movements and then dodge it at the right time.

To defeat Arachsiam, start attacking as early as possible and focus on the glowing purple spots on her spider back and her human chest for maximum damage. After depleting two health bars, she will become invulnerable, giving you enough time to destroy spider eggs around the area. These eggs can be identified by a faint red glow.

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Rabizex

Required Level	40
Where to Find	Monolith of Thirst in Chalk Peak

Rabizex is a powerful boss in Once Human, known for its ability to manipulate shadows and relentless attacks. This beast possesses a canine-like appearance and is equipped with sharp fangs and claws, which it uses for close-range attacks. Additionally, the Rabizex can shoot powerful Stardust energy projectiles from a distance.

To defeat Rabizex, focus on targeting its weak points while maintaining a safe distance and being prepared to dodge its swift attacks. Use weapons with high DPS to consistently deal damage and drain its health pool.

As Rabizex’s health drops, it enters a frenzied state, revealing its true form. In this enraged phase, its attacks become more powerful, but its head becomes a vulnerable weak spot, giving you an easy target to deal more damage.

Mensdevoran

Screenshot showcasing the start of The Forsaken Giant boss fight in Once Human

Required Level	60
Where to Find	Forsaken Monolith in Red Sands

The Mensdevoran, also known as the Forsaken Giant, is one of the hardest bosses in Once Human. If you’re not well-prepared, defeating the Mensdevoran can be incredibly challenging.

Mensdevoran often uses its large arms to slam the ground, creating shockwaves or sweeping its hands in an AoE attack. I f that wasn’t enough, Mensdevoran can teleport to different locations, taking you by surprise. It also has the ability to summon elite mobs that can inflict significant damage if left unchecked.

To defeat the Forsaken Giant, target the glowing weak points on its body while strategically avoiding its powerful attacks. Be quick on your feet and dodge at the right time to minimize damage taken from Mensdevoran’s attacks.

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