OSRS Regicide Quest Guide: 56 Agility and Tirannwn Access

Overview

Regicide needs 56 Agility (boostable, and not checked until the dense forest), 10 Crafting (not boostable) and Underground Pass, which needs Biohazard and Plague City. You also have to kill a level 110 Tyras guard, and you are allowed to safespot him. Start by talking to King Lathas on the 1st floor of Ardougne Castle (2nd floor US). If you go through the pass before he gives you the mission, the dense forest on the far side will not let you through.

It is part four of the elf series, Experienced and Long. Most of the time goes on three things: walking the Underground Pass again, crossing the traps of Isafdar, and making a barrel bomb from coal tar, sulphur and quicklime with the Chemist's still in Rimmington.

Rewards are 3 quest points, 13,750 Agility XP, 15,000 coins and access to Tirannwn: the BJS fairy ring, Iorwerth camp and Zul-Andra teleport scrolls, Port Tyras charters, and the right to wield a dragon halberd (60 Attack, 30 Strength). Roving Elves, both Mourning's End quests and Song of the Elves come after it.

Requirements and Prerequisites

Two skills, one quest chain and one fight.

Quest prerequisites:

• Underground Pass
• Biohazard, which Underground Pass needs
• Plague City, which Biohazard needs

You also have to kill a level 110 Tyras guard: 110 hitpoints, stab attacks, max hit 15. Safespotting is allowed, and 60 combat is the recommendation.

Items to Bring

Most of the required list is for the barrel bomb, so check it off before your first trip through the pass.

Required

• 6-9 coal in the bank. The wiki recommends having at least 25 as a buffer, and you can bring it noted; Phials in Rimmington un-notes it.
• Bow and arrows, or lit fire arrows if you have some.
• 2 ropes (3 in case you fail)
• Spade
• Limestone (or a pickaxe and Mining 10+). Note that limestone bricks will not work.
• Tinderbox
• Strip of cloth (4 balls of wool on a loom, not a bolt of cloth). The loom at the farm south of Falador works.
• Pestle and mortar
• Gloves, worn at the furnace when you turn limestone into quicklime.
• Pot (obtainable during quest)
• Cooked rabbit (obtainable during quest) or roast rabbit

Recommended

• Combat 60
• Some antidote++ or antipoisons
• Stamina potions and weight-reducing gear (such as Boots of Lightness or the Graceful outfit)
• At least 3 Summer pies to boost Agility for several obstacles, and to recover health from the traps
• Ranged, Magic or a Halberd to safespot the Tyras Guard
• Coins to buy food in the Underground Pass
• Any axe to cook the raw rabbit anywhere
• Fast travel to Rimmington such as Rimmington teleport tablets, Teleport to House if your house is in Rimmington, Ring of the elements, Falador teleport, or Explorer's Ring 2 or higher.
• Fast travel to the Underground Pass (West Ardougne teleport or travel from East Ardougne)
• Iban's staff, if you have one, to recharge free at the well on the way.

Where to Start

Starting location: King Lathas, 1st floor of Ardougne Castle in East Ardougne (2nd floor US).

Talk to him before you go back underground. The pass is quicker the second time: your grid path from Underground Pass stays the same, and you do not need to collect the four orbs of light again.

You will make several trips, so set up fast travel to Rimmington (a house there, ring of the elements, Rimmington teleport tablets or an explorer's ring 2+) and to West Ardougne before you start.

Walkthrough, Stage by Stage

Steps follow the OSRS Wiki quick guide order. Dialogue choices that matter are listed in brackets.

1. 1

   Back through the Underground Pass.

   Speak with King Lathas in Ardougne Castle. (dialogue: I assume you have a plan? → Yes.) You can do this straight after finishing Underground Pass.

2. 2

   Go back into the pass from the far west side of West Ardougne.

   Same route as in Underground Pass.

3. 3

   Search the abandoned equipment next to the fire for the cloth.

   Use the cloth on your arrows, light them, and use your bow and lit arrows to open the gate.

4. 4

   Take a plank to the north, if you did not bring one.

   Head south, then east, crossing the gap with a rope while ignoring the water.

5. 5

   Cross the grid using the same pattern you did before.

   Pull the lever.

6. 6

   Search the odd markings to bypass traps, then go directly down the well.

   You do not need to re-collect the four orbs of light for the furnace.

7. 7

   Dig the loose dirt in the first southern cage, cross the ledge, and take the swamp shortcut (with 50 Thieving) or traverse the maze.

8. 8

   Go south and squeeze through the pipe, pass through the tunnel, and head north-east where the paladins were.

9. 9

   Use a plank on the flat rocks and open the doors.

   If you brought Iban's staff, charge it at the Flames of Zamorak well just before the large area with Iban's Temple.

10. 10

    Travel south to Iban's Temple and enter the well.

    Koftik gives you free food if you talk to him.

11. 11

    Exit the cave to the west.

12. 12

    Traversing Isafdar.

    Run west through the forest, then talk to Idris when he spawns (this may take a little while).

13. 13

    Run south-west and jump the leaves trap (click the middle square closest to you).

14. 14

    Run west to the stick trap.

    Stand one tile in front of the stick trap and spam-click it. Done that way it never hits you, here or at any other stick trap in the quest.

15. 15

    Follow the path north-west, jump the leaves trap, and continue north until you reach the Iorwerth Camp. Cross the Log Balance to reach it.

16. 16

    Speak with Lord Iorwerth.

17. 17

    To reach the Elf Tracker, run back the way you came and turn south-east at the stick trap without crossing it.

18. 18

    Talk to the Elf Tracker, then Lord Iorwerth, who gives you a crystal pendant (keep a slot free).

    Go back to the tracker, follow the tracks west of him and talk to him again.

19. 19

    Kill the level 110 Tyras guard that spawns in the dense forest.

    Safespot him by the mushrooms to the south-west, or pray Protect from Melee.

20. 20

    Head north past the tripwire, then west and south to Tyras Camp and talk to General Hining.

    Take at least 2 barrels; 3 is safer in case a distilling attempt goes wrong.

21. 21

    Back at the Elf Tracker, use 2 or 3 barrels on the coal tar just south of him, and take a piece of sulphur from beside the tar.

22. 22

    Talk to Lord Iorwerth with a free slot for the Big Book of Bangs.

    Read it and keep it in your inventory, then ask him about sulphur, naphtha, quicklime, barrel and fuse. There is a pot spawn north of him.

23. 23

    Get limestone:

    mine it east through the dense forest past the leaves trap (watch for level 88 dire wolves), or bring it. With gloves equipped, use the limestone on a furnace for quicklime, then grind it with a pestle and mortar while carrying a pot. Grind the sulphur too.

24. 24

    Talk to the Chemist in Rimmington with the Big Book of Bangs in your inventory.

    Use a barrel of coal tar on the still with your coal in your inventory: turn the tar valve fully right, set the pressure valve to the middle once the gauge is green, then add coal 1 or 2 at a time to keep the heat near green. Adding 4 at once usually overheats it. Make a second barrel of naphtha while you are there, because Mourning's End Part I needs one.

25. 25

    Use the pot of quicklime and ground sulphur on the barrel of naphtha to make a barrel bomb (unfused).

26. 26

    Use the strip of cloth on the barrel bomb (unfused) to make a barrel bomb.

27. 27

    Royal assassination.

    Go through the Underground Pass once more. Bringing summer pies this time is highly recommended because you are now carrying a very heavy barrel bomb.

28. 28

    If you did not bring your own cooked rabbit, kill one north-west of the Elf Tracker and cook it.

    If you forgot an axe, there is a fire in the Iorwerth Camp.

29. 29

    Head to the catapult, north of the Tyras Camp.

30. 30

    If you did not bring a tinderbox, go south to Quartermaster's general store and purchase a tinderbox before you give the guard near the catapult the cooked rabbit.

31. 31

    Use the cooked rabbit on the guard near the catapult.

32. 32

    Use the bomb on the catapult.

33. 33

    Speak with Lord Iorwerth.

34. 34

    Lord Iorwerth's message.

    Attempt to enter Ardougne Castle.

35. 35

    Speak with King Lathas.

36. 36

    Finish the closing dialogue to complete the quest.

Traps, Obstacles and the Distiller

Regicide has no light puzzles. The slow parts are the traps of Isafdar and the naphtha still in Rimmington.

Leaving the still's interface resets your progress, so read the steps before you start distilling.

Boss Fights

There is one required kill. The other hazards are tripwire poison and the level 88 dire wolves near the limestone mine.

Deaths follow normal rules, so leave expensive items you do not need in the bank.

Rewards and Unlocks

The coins and XP are small. Access to Tirannwn is the reason everyone does it.

What it opens up

• Roving Elves, once Waterfall Quest is also done
• Mourning's End Part I and Part II after that
• Song of the Elves and Prifddinas at the end of the chain

Fact checked 2026-10-12 against the OSRS Wiki quest page and quick guide.

Common Mistakes and Warnings

Regicide stalls on chemistry items and forest fails.

• Going through the pass before King Lathas gives you the mission, so the dense forest will not let you in.
• Bringing too little coal and running out mid-distill.
• Skipping antipoison and getting poisoned by tripwires on every crossing.
• Arriving at the dense forest below 56 Agility without a boost.
• Forgetting a bow and arrows for the fire-arrow gate in the pass.
• Fighting the level 110 guard in the open without a safespot or Protect from Melee.
• Using limestone bricks instead of limestone, or forgetting gloves at the furnace.

Ironman Notes

Coal can be noted for the trip. The minimum is 6-9 in the bank, but the wiki recommends staging at least 25.

Summer pies boost Agility and heal the trap damage, so they cover both the dense forest and the Isafdar commute.

Make the second barrel of naphtha for Mourning's End Part I while you are at the still. It saves another trip to Rimmington.

FAQ

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