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Boss guides / Alchemical Hydra

Fira’s encounter library · Slayer bosses

Alchemical Hydra OSRS gear, inventory & strategy guide

A practical starting plan for ranged combat, with hazards to prepare for and an exact 28-slot inventory. Adjust equipment to your budget in the live armoury.

Recommended approachranged
Combat styleranged
Encounter groupSlayer bosses

What you need before entering

Hydra assignment from Konar; 95 Slayer.

This guide is an orientation for the stated method. Confirm current requirements and practise mechanics before risking valuable equipment.

Alchemical Hydra weaknesses and hazards

Lure Hydra onto the correct vents to remove its defence in the opening colour phases.

Recommended fight plan

  1. Lure Hydra onto the correct vents to remove its defence in the opening colour phases.
  2. Count its attacks and switch protection prayer; the final phase switches after every attack.
  3. Learn lightning, poison and flame positioning. Wear dungeon heat protection unless exempt.

Exact 28-slot starting inventory

Crossbow ranged · learning trips. Read this as a conservative starting bag, not a guaranteed trip length.

  • Ranging potion(4) OSRS itemRanging potion(4) × 11 inventory slot · Potion
  • Antidote++(4) OSRS itemAntidote++(4) × 11 inventory slot · Protection
  • Prayer potion(4) OSRS itemPrayer potion(4) × 1212 inventory slots · Potion
  • Teleport to house (tablet) OSRS itemTeleport to house (tablet) × 21 inventory slot · Travel
  • Dramen staff OSRS itemDramen staff × 11 inventory slot · Reusable
  • Stamina potion(4) OSRS itemStamina potion(4) × 11 inventory slot · Potion
  • Shark OSRS itemShark × 99 inventory slots · Food
  • Cooked karambwan OSRS itemCooked karambwan × 22 inventory slots · Food

Wear heat-protection boots unless exempt, and equip compatible bolts before leaving. The bag contains no spare bolts: the worn recommendation provides the initial 200.

Equipment and budget

The interactive armoury recommends a curated, boss-appropriate equipment progression within the bankroll you enter. It also shows worn slots, item statistics, live quoted values and the inventory cost separately. It is not a maximum-DPS simulator, and it cannot verify your levels, quests, charges or unlocked travel routes.