Instruction manual
This is the quick guide for Regicide.
For a more in-depth version, click here.


Start point Quest point icon Randomly receive a message from King Lathas' messenger (similar to a random event, and it will typically occur within 30 minutes of completing Underground Pass), however some players have experienced a wait of several hours before the messenger arrives.
Official difficulty Master
Description Continuing the Plague City series, the Regicide Quest takes you beyond the 'Well of Voyage' to a new realm.

King Lathas will employ you once again, this time for the grim task of disposing of his brother.

Upon travelling to the realm you will find yourself surrounded by new and strange plants, animals and even a new race.

Once there, you will see that everything is not as serene as it first appears.

Length Long
  • Level 56 Agility icon Agility (boostable, requires boosting, bring at least 6 summer pies)
  • Level 10 Crafting icon Crafting (To make the strip of cloth. It is tradeable, but can't be traded on the Grand Exchange, so if you want it without 10 crafting you have to ask a friend to make one for you.)
  • Completion of Underground Pass
  • Ability to defeat a level 110 Tyras guard (safespots are available).
Items required


Bring 6-8 summer pies if boosting from 51

Enemies to defeat Level 110 Tyras guard


Starting out

  • Talk to King Lathas in Ardougne Castle (wait a few minutes for King's Message to be delivered to you).
  • Talk to King Lathas again after receiving the King's Message.

Trip to Tirannwn

Items Required: Agility potions (if boosting), bow and several arrows, at least one rope, tinderbox, spade, antipoison(s), pickaxe (if limestone is needed). Recommended: High-healing Food, 1-2 stamina/energy potions, coins to buy food in the Pass, combat equipment to defeat Tyras guard

  • Travel through the Underground Pass (entrance on the far west side of West Ardougne). Refer to this guide if you get stuck.
  • Travel down to Iban's Temple and enter the well (Optional: Talk to Koftik for food.)
  • Exit the cave to the west.
  • Run through the forest, talk to Idris.
  • Run southwest, Jump the Leaves trap, run west, Pass through the Sticks trap.
  • Follow the path northwest, Jump the Leaves trap, and continue North until you reach an elf camp. Cross the Log Balance to reach it.
  • Talk to Lord Iorwerth.
  • Talk to the elf tracker. To reach him: run back the way you came and run southeast once you reach the Sticks trap (DO NOT go through Sticks trap)
  • Talk to Lord Iorwerth again.
  • Talk to the elf tracker again.
  • Click to follow the tracks a few steps west of the tracker near the blue mushrooms.
  • Talk to the elf tracker.
  • Climb through the dense forest, kill the guard.
  • Go north, pass tripwire and go through more dense forest.
  • Run west then south through more dense forest, talk to General Hining in the camp.
  • Take at least 2 barrels (you will need 2 for Mourning's End Part I, and additional barrels may be useful in case of failing the distillation).
  • Use your barrels on the tar just south of the Elf Tracker.
  • Get 2 pieces of sulphur from right next to where you got the tar (you only need 2 if you plan on doing Mourning's End Part I).
  • Talk to Lord Iorwerth with one empty inventory slot. Read the book and keep it in your inventory.
  • If you don't yet have limestone but did bring a pickaxe, head east from the elf camp now to mine some.
  • Teleport out of Tirannwn using any method and head to a bank.


Items Required: Limestone, sulphur, pot, pestle and mortar, 4 balls of wool (if strip of cloth is needed).

  • Use limestone on any furnace (make sure gloves are equipped or you will take damage.)
  • With a pot in your inventory, use your pestle and mortar on the quicklime. If you do this incorrectly, you will need to repeat the previous step with a new limestone.
  • Use your pestle and mortar on the sulphur.
  • If you have not already created a strip of cloth, use four balls of wool on the loom in the farm south of Falador to make one.

Deadly Chemistry

Items Required: Pot of quicklime, ground sulphur, strip of cloth, 1-2 barrels of coal-tar, "Big book of bangs", 15-20 coal, ~100 coins if planning to bring noted coal. Recommended: Method of teleportation to Rimmington

  • The coal from your bank can be noted, but you will need to un-note it using Phials in the nearby general store once you get there.
  • Talk to the chemist (Chat 4) in Rimmington. Make sure you have the book in your inventory. (If you don't, the Quest Journal will not update!)
  • Un-note your coal and then use your barrel of tar on the fractionation still outside (complete this process twice, if you plan on completing Mourning's End I because a barrel of naphtha is required for that quest).
  • Operate the still:
    1. Turn the valve on the right all the way to the third tick (all the way to the right).
    2. Wait for the pressure gauge to land in the green zone.
    3. Turn the valve on the left to the second tick (in the middle) to halt the pressure in the green zone. If it landed in the red zone, you could turn the valve right to relieve some pressure, then back to the middle.
    4. The valves never need to be touched again, and the pressure gauge can be ignored.
    5. Add 2 coal, and then 1 additional coal whenever the heat gauge falls too low (below, or counterclockwise from, the green zone). Don't spam click the "add coal" button. If you add 4 at once, it is likely to overheat and you will lose your barrel of coal-tar. The process is fast and may use only 4-5 coal.
  • Use the pot of quicklime and ground sulphur on the barrel of naphtha to make a Barrel bomb (unfused).
  • Use the strip of cloth on the Barrel bomb (unfused) to make a Barrel bomb.

Death of a King

Items Required: Agility potions (if boosting), Bow and several arrows, at least one rope, tinderbox, spade, antipoison(s), plank (optional), cooked rabbit (or logs/axe to cook your own), and the completed barrel bomb . Recommended: High-healing Food, 1-2 stamina/energy potions, coins to buy food in the Pass.

  • Go through the Underground Pass again.
  • If you haven't brought your own cooked rabbit, you can kill one northwest of the elf tracker and cook it.
  • Head to the catapult, north of the Tyras Camp.
  • Use the cooked rabbit on the guard near the catapult. Use the bomb on the catapult.
  • Talk to Lord Iorwerth.

The Lord's Message

  • Attempt to enter Ardougne Castle.
  • Talk to King Lathas.
  • Quest complete!


Regicide reward scroll

Required for completing

Completion of Regicide is required for the following:

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