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Main page/Guides/Bestiary/Boss list/Alchemical Hydra

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Alchemical Hydra
V3Kvs7F.gif
K2mODtT.png General info
Released September, 25 2019
Combat level 428
Respawn timer 20 seconds
8M9YZSf.png Combat info
Hitpoints 1100
Max hit 17+17 (normal)
26+26 (empowered)
Aggressive Yes
Poisonous Yes
Weakness Ranged and Dragonbane weapons
Attack style Magic and Ranged
18.png Slayer info
Required slayer level 95
Slayer XP unknown
Assigned by
Immunities
Yes
Yes

Alchemical Hydra

The Alchemical Hydra is a five headed hydra with a combat level of 428. The boss has four different phases and will have different type of special attacks in each phase. Level 95 slayer is required to enter and attack the Alchemical Hydra.


The Alchemical Hydra uses both ranged and magic to attack players. It changes its attack style every three attacks, whether if they hit or not. Both these attacks can be fully negated by using Deflect Missiles and Deflect Magic prayers. After every nine normal attacks, the Alchemical Hydra will perform a special attack.


The Alchemical Hydra has a heavy damage reduction in the first three phases. The damage reduction can be removed by having chemical sprayed on the boss - which happens when the boss stands on top of the pools. Read below for more information.

How to get there

You can get to the Alchemical Hydra by using the teleport interface (which can be accessed by pressing CTRL + T on your keyboard or by clicking on the world map in-game).


4OAirsd.png



This will teleport you outside of the Alchemical Hydra's lair.

leTWAJr.png

Once inside, the player can not exit through the door. Only teleporting out or dying will allow the player to leave the lair.

Instance

Alchemical Hydra is an instanced boss. Unlike the instanced boss Vorkath, this boss does not require the player to create a new instance every kill. It has a respawn timer of 20 seconds.

Entrance fee

Entrance fees per rank
3GEVAw4.png
  • Hardcore ironman: uA298VF.png 25K
  • Ironman: uA298VF.png 250K
  • Regular players: uA298VF.png 50M
  • Super donators: uA298VF.png 35M
  • Extreme donators: uA298VF.png 25M

Strategies

The Alchemical Hydra has four phases: poison, lightning, flame and enraged. The Alchemical Hydra begins with the poison phase. A new phase will commence every 275 damage the boss has taken (or 25% of it's total health), similar to the boss Nex.

At the start of each phase, the Alchemical Hydra will have a 75% damage reduction to all weapons and a 50% damage boost in first two phases. The damage reduction and damage boost can be removed by luring the boss over one of the chemical pools on the floor. If the Hydra is lured over the wrong chemical pool, the attack damage will be increased instead.

The Alchemical Hydra will attack with both Ranged and Magic: the attack style will change after every three normal attacks and after every nine normal attacks the Alchemical Hydra will perform a special attack. The normal attacks can be fully negated if the player is switching the prayers correctly.

Poison phase

This is the first phase of the Alchemical Hydra. The boss will have 5 heads and green skin during this phase. The 5-headed green Hydra has to be lured to the red chemical pool to remove its damage reduction and damage boost.

After the first three normal attacks, the Alchemical Hydra will throw poison blobs around the player's location will deal up to 12 damage per tick when standing on them.

Lightning phase

The Alchemical Hydra will have 4 heads and a blue skin during this phase. The 4-headed Hydra has to be lured to the green chemical pool to remove its damage reduction and damage boost.

During this phase, the Hydra will launch lighting projectiles across the room. When the players get hit by the lighting, they will be temporarily paralyzed and the following message will appear in the chatbox:

imNQzHz.png

When the 4-headed Hydra reaches 550 hitpoints (or 50% of its total health), it will lose one of its heads and the next phase will start.

Flame phase

The 3-headed red skin Alchemical Hydra will need to be lured over the blue chemical pool to remove its damage reduction and damage boost.

During this phase the Hydra will, as its special attack, stun the player and walk to the center of the chamber. Once it has reached the center, the Hydra will breathe layers of fire on both sides of the player and a tracking fire. The tracking fire will follow the player's movement and will do up to 20 damage if the player does not dodge it. The damage can be avoided by walking/running around. The Hydra will start attacking normally again 10 seconds after it launches the tracking fire.

When the 3-headed Hydra reaches 275 hitpoints (or 25% of its total health), it will lose one of its heads and the next phase will start.

Enraged phase

The 2-headed Hydra will have grey skin during this phase and will not have any damage reduction (thus does not need to be lured over any chemical pool).

During the enraged phase, the 2-headed grey Hydra will change attack styles after every attack. The special attack from the poison phase (poison blobs) will also be used during this last phase. It is recommended to continuously switch prayers during this phase.

Gear and inventory

Ranged set-up

Gear Inventory
9ODTvVW.png lBE2zvg.png
  • Helm: Pernix cowl
  • Body: Pernix body
  • Legs: Pernix chaps
  • Boots: Glaiven boots
  • Weapon: Twisted bow
  • Ammunition: Amethyst arrows
  • Shield: Divine spirit shield
  • Cape: Completionist cape
  • Amulet: Necklace of anguish
  • Gloves: Barrows gloves
  • Ring: Ring of suffering
  • 2x Overload flask (6)
  • 4x Super restore flask (6)
  • 22x Saradomin brew flask (6)

Video of killing Alchemical Hydra

Drop Table

Drop Name Quantity Rarity Ratio
QPeiYdX.png Hydra's claw 1 Very Rare 1/750
5yfjVkX.png Hydra leather 1 Very rare 1/500
91tCH8V.png Alchemical hydra heads 1 Very rare 1/250
FjarYvI.png Hydra tail 1 Very rare 1/190
VAarSFi.png Hydra's heart 1 Very rare 1/185
kaf0YVs.png Hydra's fang 1 Very rare 1/185
crPwdIo.png Hydra's eye 1 Very rare 1/185
hqlP8fh.png Brimstone key 1 Rare 1/60
QtelnZV.png Uncut onyx 1 Rare 45/100
YFmIwV3.png Dragon knife 20-30 Rare 1/50
Cxz8oVv.png Dragon thrownaxe 20-30 Rare 1/45
9fytbE2.png Dragon bolts (unf) 20-30 Rare 1/40
lxqyNnF.png Tooth half of a key 1 Rare 1/35
jfw80FB.png Loop half of a key 1 Rare 1/35
ImzSOGO.png Raw rocktail 30-70 Rare 1/15
KR1Lqaj.png Uncut dragonstone 50-80 Uncommon 1/10
Nue2ytF.png Rune bar 50-100 Unommon 1/6
R3x1QQU.png Torstol seed 10-20 Uncommon 1/5
axOZdMX.png Raw shark 50-100 Uncommon 1/4
WUUCVw2.png Yew logs 50-100 Uncommon 1/3
uA298VF.png Coins 500K-1M Uncommon 1/3
CiAhsIT.png Hydra bones 2 Always 1/1