Regicide

Regicide is the fourth quest in the Plague quest series, where King Lathas sends the player to Tirannwn to kill his brother, King Tyras, and end his tyranny.

One-Man Army
(The King's message is received automatically approximately 15-20 minutes after finishing the Underground Pass quest)

After receiving a message from King Lathas, go pay him a visit. He informs you that they have managed to find his brother, King Tyras, with help from the elves; Tyras is hiding in the elven lands along with his troops. Lathas asks you to go through the Underground Pass again and venture into these lands to kill his brother.

If you do not talk to King Lathas before going to the Well of Voyage, Iban will still be there.

Underground Pass
''Before going into the pass, make sure you have all the items you will need to get through it, and to complete a portion of the quest up until you activate the Tiranwwn lodestone. Otherwise, if you reach Isafdar and realize you have forgotten something, you will have to make your way through the Underground Pass again, which can be time-consuming.''

Once you are prepared, return to the Underground Pass. See this separate guide for detailed instructions for getting through the pass and reaching the well.

You should make your way to Iban's Temple, where you defeated him during the Underground Pass quest. Although you might see Iban from outside the temple, it is safe to proceed if you have completed the quest. You can talk to Koftik to obtain some food and also recharge your prayer and summoning points there.

In the centre of the temple is the Well of Voyage; use it to travel to Isafdar.

Isafdar, the Elven Lands
Exit out of the cave and head a bit west to meet up with an elf named Idris. He starts to mention something about Lathas, but is swiftly gunned down by Morvran and Essylt. The elf guards will tell you to talk to Lord Iorwerth at the Elf Camp in the north-west corner of the forest.

Obstacles
To travel to the elf camp, you will need to traverse across the obstacles in the elven forest. Note that traps do not stop forward motion, with the exception of the stick trap. You fall right into/over them and take damage.

On the way, players encounter four different obstacles. If you run out of food, you can kill rabbits around Isafdar and cook them on a fire in the elf camp.

Tracker Tutorial
Once you reach the elf camp, talk to Lord Iorwerth and tell him that King Lathas sent you. He directs you to meet up with his tracker, the one who can guide you to Tyras' camp.

Teleport to the Tirannwn lodestone if activated, or go south-east of the camp until you find an elf tracker, as shown by the map. If you haven't activated the lodestone, do so now as you can avoid going through the Underground Pass again. He doesn't trust your allegiance since you're a human, so return to Lord Iorwerth to obtain a token - a crystal pendant. Talk to the tracker again with the pendant with you, and he'll tell you how to find the camp.

A bit west of the tracker, there are some footprints heading into the forest; try to follow them and you will be told that you can't. Go back to the elf tracker and he'll teach you how to traverse across the dense forests in Isafdar. Go back and climb through it, with any boost if necessary.

Enemy Base
After you pass through the dense forest, a level 84 Tyras guard will attack you, equipped with a steel halberd. He should be an easy defeat for experienced players; however, players may use prayer and food if the need arises.

After you've killed the guard, continue on to the Tyras Camp, passing any traps you encounter. Once you reach Tyras Camp, you will be able to charter a ship to and from Port Tyras, enabling an easier route to Isafdar. The trip costs 3200gp and in order to return here, you must leave from this port once.

Once in the camp, speak to General Hining and request to see King Tyras. He tells you that the King doesn't ever entertain an audience and sends you on your way. Hence you must now devise a plan to kill Tyras inside his tent.

To avoid making an extra trip to the camp, grab at least 2 barrels while there - a few spares if you make a mistake later.

An Explosive Plan
Go back to Lord lorwerth, and read the Big book of bangs he hands you. Keep the book as you will need it later. You must now follow the instructions in the book to create an explosive compound.


 * 1) Go south of the elf tracker until you come up to a poison waste swamp, where you should find some coal tar. Fill all but one of your barrels with coal tar.
 * 2) Grab some sulphur lying on the ground nearby and grind it with your pestle and mortar to make ground sulphur.
 * 3) The third component you will need is quicklime. To make some, use limestone on a furnace while wearing gloves. You can mine some limestone in Isafdar, but it may be easier to obtain by buying it on the Grand Exchange, or at the limestone mine near Paterdomus.

Once you have these items, you can charter a ship from Port Tyras or use any other method to reach Rimmington.

Fractionation
Items needed: 10-20 coal, big book of bangs, barrel of coal-tar, an empty barrel, gloves, strip of cloth, quicklime, ground sulphur, and a pot.

Go to the chemist's house just west of Rimmington and talk to him. Noting the book Iorwerth gave you, he tells you to use his still to create the required mixture; use your barrel of coal-tar on the fractionation still outside his house.

To operate the still:
 * Rotate the tar regulator clockwise twice, to make the tar flowing at maximum. The 'pressure' indicator on the left should go up.
 * When the pressure enters the green region, rotate the pressure valve clockwise once to let out some pressure. This should stall the pressure indicator.
 * Start adding coal. This raises the 'heat' indicator on the right. If it's below the green region, add more coal. If it's above, don't add coal until it gets lower.
 * If the heat reading reaches the dark orange portion, you've spoilt your compound and must start again.
 * If you run out of coal, your progress will be saved. This means you do not have to re-set the pressure or re-add coal to it.
 * The bar on the bottom should start turning green. When it's full, stop adding coal and close the window to replace your empty barrel with a barrel of naphtha.

Next, grind the quicklime with a pot in your inventory, to get a pot of quicklime. Be sure to have a pot in your inventory before grinding or else the quicklime will disappear and you will need to heat another piece of limestone. A pot can be bought from the general store in Rimmington.

Add the pot of quicklime and ground sulphur to the naptha mix, producing a barrel bomb. Finally, use the bomb on a strip of cloth to complete it.

Catapulted Into Oblivion
Items needed: Barrel bomb and a cooked rabbit (can be bought in raw form from a charter crewmember, and cooked anywhere in Isafdar).

Head back to Tyras' camp using a charter ship to Port Tyras. Cross the dense forest north of the camp and offer the cooked rabbit to the plainclothes Tyras guard near the catapult, as a bribe. Free from any interference, use the barrel bomb on the catapult.

You will see the bomb hit King Tyras' tent and burn it to the ground. Go back to Lord Iorwerth, who gives you a message to take to King Lathas, also granting you access to the overpass of Arandar.

Make sure you have the letter before transporting away. If however, you have a clue scroll in your inventory meant for Lord Iorwerth, you must complete it before moving on with the quest.

Dumbstruck
Travel to Ardougne Castle by any method you want. On the way to delivering the message, an elf named Arianwyn suddenly appears before you. He breaks the magic seal on the letter and asks you to read it.

In the letter, Lord Iorwerth assures King Lathas that Tyras has been killed and that the Dark Lord can be called into Gielinor to take over the world. Arianwyn further reveals the "path" is connected to Zamorak's realm, and convinces you to join his side instead. Not to arouse any suspicions, Arianwyn tells you to claim your reward from Lathas.

Rewards

 * 3 Quest points
 * 13,750 experience
 * 15,000 coins
 * Access to Isafdar and the overpass of Arandar.
 * Access to Port Tyras by using charter ships.
 * Ability to wield and use a dragon halberd (bought for 325,000 coins from the quartermaster in Tyras Camp).
 * Ability to have elves assigned as a slayer task by Chaeldar and Sumona.
 * 2 extra spins on the Squeal of Fortune.

Music Unlocked

 * Breeze
 * Elven Mist
 * Everywhere
 * Forest
 * Lost Soul
 * Meridian
 * Riverside
 * Well of Voyage
 * Woodland

Required for completing
Completion of Regicide is required for the following:
 * Catapult Construction
 * Roving Elves

Cultural references

 * The barrel bomb has a real life parallel - , which ignites on contact with water and is very hard to put out once it begins to burn.
 * Naphtha was used in Mongol siege warfare, during the reign of . It is thrown by a catapult and catches fire when airborne.

Regicide Regicide