InOnce Human, you are tasked to capture deviations and defeat bosses found inside various Monoliths, and Arachsiam is one of them. This boss features a possessed woman at its front and a massive spider body.

While the boss’s overall size is intimidating, defeating it requires firepower, a skilled squad, and knowledge of its immunity phase. You also need to be at least level 30 to start the boss fight and also to stand a chance. In this guide, we have explained all the attack patterns of Arachsiam, and the best strategy to beat the boss easily in the game.

Arachsiam charging attack in Once Human

Description

Web Spit

The boss shoots the web in multiple directions in front of it. The web can capture and bind a player for a moment, making them unable to move.

Poison Mist

The boss uses its tail to release a green poison mist in front of it. The mist has a small area and is visible, making it easy to avoid.

Spider Minions

During the fight, the boss summons spider minions that primarily enter the arena using the web bridges surrounding it.

Charged Jump

If you are caught and captured by a web spit and the boss has its aggro on you, Arachsiam will do a charged jump and come down crashing on you.

Rush Attack

Arachsiam raises its left leg for a brief moment and then unleashes a series of furious melee attacks in a single direction.

Blinding Mist

After depleting the boss’s health by 20% or more, it releases a blinding mist. While this attack does not deal damage directly, it makes Arachsiam immune, prevents players from attacking the boss, and makes it difficult to locate spiders surrounding the arena.

Arachsiam Boss Fight Strategy

Arachsiam is ahighly mobile bosswho is swiftly moving throughout the arena. Itslegs are difficult to hitand take reduced damage too. However, the boss’sweak spots are the possessed woman,her head, and thepurple bulgeson the spider’s back.

Targeting all these three weak spots willdeal the highest damage to Arachsiambut hitting them precisely can be challenging due to the boss’s constant movement and frequent aggro shifts between players. In such cases, we recommend youfocus on shooting Arachsiam’s belly. The massive size of it makes thebelly an easier target, allowing you toland shots from a distance.

Purple bulges weak spot of Arachsiam in Once Human

Whenever Arachsiamraises its left leg, you should immediatelymove to the left or rightto avoid its sight. Avoiding this attack is crucial because the boss charges up and thenrushes forward with a flurry of strikesusing itsspider legs. If Arachsiam catches you during this attack, you willtake massive damage. For players wearing tier one or tier two armor pieces, this attackcould even be fatal.

Additionally, be mindful of Arachsiam’sweb shots. If youget caught in one, Arachsiam will charge up ajump and crash down on you. This attackinstantly knocks you down, and without anAdrenaline Shotor a teammate to revive you, theboss fight will be over instantly.

Arachsiam web captured a player in Once Human

When you deplete Arachsiam’shealth by 20percent or more, theboss releases a mist. During the mist phase,Arachsiam becomes immuneto damage andclimbs the rocky pillarat the center of the arena.

During the mist phase, you shouldrush to the edgesof the arena tolocate the red glowing spots, which arespider eggs. If you take too long, the eggs will hatch, releasing small spiders into the arena.

Arachsiam immune to attacks during the mist phase in Once Human

To progress in the boss fight, you need todestroy all the spider eggsduring the mist phase. There are atleast two locationswhere you will find these eggs. If you are playing with a full squad, it’s best to divide and search for them.

However, be mindful of Arachsiam, as itfires websthat can causephysical damageif they hit you. The best strategy is tokeep moving while shooting the spider eggsor use high DPS weapons like sniper rifles.

Shooting spider eggs to lift the mist of Arachsiam in Once Human

Once themist lifts, you canresume attacking Arachsiamas the immunity will no longer be in effect. If youdeal enough damagewhile the boss is on the stone pillar,Arachsiam will stumbleandlay on its stomach, giving you a brief window to target its weak spots without worrying about its movements.

Rinse and repeat this process, and you will be able to beat Arachsiam in less than ten minutes in the game.

A player defeated Arachsiam in Once Human

Rewards

Defeating the boss for the first time willgive you theDreamcatcher deviantas a reward. If you have at least one Controller, using it will yield more rewards, such as weapon mod parts,Stardust Source,Electronic Parts, and Gear Mods.