A 95 Slayer boss in the Karuulm Slayer Dungeon. Four colour phases, each weakened only by the right chemical vent, and drops that make the Brimstone ring, Dragon hunter lance and Ferocious gloves.
A Slayer boss: combat 426 with 1,100 hitpoints, at the end of the Karuulm Slayer Dungeon. It loses a head every quarter of its health and changes its attacks each time. A kill pays 1,320 Slayer XP.
| Detail | Value |
|---|---|
| Requirements | 95 Slayer and a hydra task from Duradel. Every monster in the dungeon, and the boss teleport, checks the task |
| Teleport | Training > Karuulm Dungeon (10,000 coins) or Bosses > Alchemical Hydra (35,000) |
| Shortcut | A pipe shortcut needs 88 Agility. The dungeon's exit comes out at Shilo Village |
| Lair | One player at a time. The doors jam while the Hydra lives, so leave mid-fight by teleport |
The phases go green, blue, red, then an enraged grey. It attacks with ranged and magic, switching every three attacks (every attack once enraged), and speeds up from every 6 ticks to every 4 in the last phase. After the first three attacks of a phase, and then every nine, it uses a special: poison pools (green and grey), converging lightning (blue), or a stun, two walls of fire and a following flame (red).
| Phase | Lure it onto |
|---|---|
| Green | the red vent (south-east) |
| Blue | the green vent (north-east) |
| Red | the blue vent (north-west) |
| Grey (enraged) | Keeps whatever state the red phase left it in |
Every kill drops 2 Hydra bones and two table rolls; the first can be a unique.
| Unique | Chance |
|---|---|
| Hydra's eye, fang or heart | 1/180 each, always in that order |
| Hydra tail | 1/512 |
| Hydra leather | 1/512 |
| Hydra's claw | 1/1,000 |
| Dragon thrownaxe or Dragon knife (500 to 999) | 1/2,000 each |
| Alchemical hydra heads (separate roll) | 1/256 |
| Jar of chemicals (separate roll) | 1/2,000 |
| Ikkle Hydra (pet) | 1/3,000 |
| Make | From |
|---|---|
| Brimstone ring | Hydra's eye + fang + heart |
| Dragon hunter lance | Hydra's claw on a Zamorakian hasta |
| Bonecrusher necklace | Bonecrusher + Dragonbone necklace + Hydra tail |
| Ferocious gloves | Hydra leather on the Broken machinery in the Karuulm dungeon, with a hammer |
The ordinary Hydras (combat 194) in the same dungeon can drop the ring pieces (about 1/361 each), the Hydra tail and the dragon knives and thrownaxes too.
Taken straight from Ashmarch's own drop data. Rates are per kill on Regular mode with no drop-rate bonus.
| Item | Quantity | Rarity | Tier |
|---|---|---|---|
| Coins | 40,000–60,000 | 1/11 | Common |
| Mystic fire staff | 1 | 1/13 | Common |
| Shark | 2–4 | 1/14 | Common |
| Ranging potion(3) | 1 | 1/14 | Common |
| Chaos rune | 150–300 | 1/17 | Common |
| Death rune | 150–300 | 1/17 | Common |
| Blood rune | 150–300 | 1/17 | Common |
| Astral rune | 150–300 | 1/17 | Common |
| Dragon bones | 30 | 1/17 | Common |
| Battlestaff | 8–12 | 1/20 | Common |
| Black d'hide body | 1 | 1/20 | Common |
| Dragon longsword | 1 | 1/34 | Common |
| Dragon med helm | 1 | 1/34 | Common |
| Rune platebody | 1 | 1/34 | Common |
| Dragon battleaxe | 1 | 1/50 | Uncommon |
| Dragon bolts (e) | 100–120 | 1/50 | Uncommon |
| Grimy avantoe | 10–15 | 1/65 | Uncommon |
| Grimy kwuarm | 25–30 | 1/65 | Uncommon |
| Grimy ranarr weed | 10–15 | 1/81 | Uncommon |
| Grimy snapdragon | 10–15 | 1/81 | Uncommon |
| Grimy cadantine | 25–30 | 1/81 | Uncommon |
| Grimy dwarf weed | 25–30 | 1/81 | Uncommon |
| Mystic robe top | 1 | 1/101 | Rare |
| Onyx bolts (e) | 35–50 | 1/101 | Rare |
| Crystal key | 1 | 1/101 | Rare |
| Grimy lantadyme | 25–30 | 1/108 | Rare |
| Grimy torstol | 10–15 | 1/108 | Rare |
| Coins | 5,550–25,550 | 1/202 | Rare |
| Item | Quantity | Rarity | Tier |
|---|---|---|---|
| Coins | 500–3,500 | 1/8 | Common |
| Monkfish | 1 | 1/12 | Common |
| Blood rune | 15–45 | 1/14 | Common |
| Chaos rune | 20–50 | 1/14 | Common |
| Death rune | 30–60 | 1/14 | Common |
| Fire rune | 70–90 | 1/14 | Common |
| Law rune | 30–60 | 1/14 | Common |
| Water rune | 70–90 | 1/14 | Common |
| Super restore(1) | 1–2 | 1/21 | Common |
| Fire battlestaff | 1 | 1/26 | Common |
| Water battlestaff | 1 | 1/26 | Common |
| Super combat potion(1) | 1 | 1/32 | Common |
| Black d'hide chaps | 1 | 1/43 | Uncommon |
| Rune kiteshield | 1 | 1/43 | Uncommon |
| Dragon bones | 3–5 | 1/43 | Uncommon |
| Battlestaff | 2–3 | 1/64 | Uncommon |
| Rune platebody | 1 | 1/128 | Rare |
| Mystic robe bottom | 1 | 1/128 | Rare |
| Dragon longsword | 1 | 1/128 | Rare |