OSRS Mourning's End Part 2 (MEP2) Guide: Temple of Light

The short version

30-second read

Enter the temple with plenty of free slots. Mirrors and crystals take inventory space, cannot be banked, and stay where you placed them.
Pray Protect from Melee against level 73 shadows. They attack anyone in the temple, and the wiki suggests about 20 prayer potion doses at 61 Prayer for a full trip.
Never leave Mirror #14 pointing west. Leaving it that way forces you back in through the Underground Pass.
Agility 75 makes the gaps far less painful. At 91 you never fail, and summer pies help below 75.

Overview

Mourning's End Part II, which most players call MEP2 or Part 2, has no skill requirements of its own. You need Mourning's End Part I, and Part I needs 60 Ranged and 50 Thieving (both unboostable) plus Roving Elves, Big Chompy Bird Hunting and Sheep Herder. Start by talking to Arianwyn in Lletya.

It is a Master quest, Long, and part seven of the elf series. Nearly all of it happens in the Temple of Light, where you place mirrors and coloured crystals across three floors to steer a beam of light, opening five chests and then the way to the Death Altar. Level 73 shadows attack you inside the temple and level 182 dark beasts sit in the tunnel on the way in, so pray Protect from Melee and keep moving.

The reward is 2 quest points, 60,000 Agility XP, a crystal trinket that lets you back into the temple, and access to the Death Altar and dark beasts. It is the elf-chain quest directly before Song of the Elves.

Table 1Mourning's End Part II at a glance9 rows

Detail	Value
Difficulty	Master
Length	Long
Quest points	2
Requirements	Mourning's End Part I (no skills of its own)
Quest number	89 (elf series part 7)
Released	17 October 2005
Starting point	Talk to Arianwyn in Lletya.
Members	Yes
Updated / fact checked	2026-10-12

Requirements and Prerequisites

Part II itself checks no skills. The skill checks come from the quests before it:

Table 2Skill checks inherited from the quest chain6 rows

Skill	Level	Boostable?	Needed for
Ranged	60	No	Mourning's End Part I
Thieving	50	No	Mourning's End Part I
Agility	56	Yes	Regicide (dense forest)
Crafting	10	No	Regicide
Cooking	30	Yes	Big Chompy Bird Hunting
Fletching	5	Yes	Big Chompy Bird Hunting

Quest prerequisites:

Mourning's End Part I, the only direct requirement
Roving Elves, Big Chompy Bird Hunting and Sheep Herder, for Part I
Regicide and Waterfall Quest, for Roving Elves
Underground Pass, Biohazard and Plague City, for Regicide

Recommended: 65+ combat, 43 Prayer for Protect from Melee, and 75+ Agility to fail fewer obstacles (91 never fails).

Items to Bring

Keep your inventory light. The temple needs free slots for mirrors and crystals, and you go up and down the floors many times.

Required

Full mourner clothes
A chisel (one can be found in the house south of the Mourner HQ)
A death talisman/tiara, catalytic talisman/tiara, Runecraft cape or 50 junk items
Rope

Combat 65+
Agility 75+ for lesser chances of failing obstacles (91 to never fail)
Prayer 43+ for Protect from Melee against the shadows
Teleports to West Ardougne: the Rat Pits (Ardougne) minigame teleport, available every 20 minutes after Ratcatchers, or West Ardougne Teleport or Ardougne Teleport (or their tablets)
A teleport crystal
About 20 prayer potion doses at 61 Prayer and 12+ doses of stamina potion.
Summer pies, which heal 22 over two bites, boost Agility by 5 and restore 10% run energy. If you pray in the temple, you mostly need food for the Agility gaps in the first and fifth stages.
Prayer bonus gear: proselyte or initiate armour, a god book, a holy symbol or dragonbone necklace.
A melee weapon with a Prayer bonus, such as any mace; the ancient mace spec restores prayer.
One pure essence to craft a death rune at the altar (65 Runecraft, boostable), needed for the hard Ardougne Diary.

Where to Start

Starting location: Talk to Arianwyn in Lletya.

Arianwyn sends you to Essyllt in the basement of the Mourner HQ, in the north-east corner of West Ardougne, for a new key. Wear your full mourner gear for that trip. The key opens the tunnels to the Temple of Light. If you lose the key, search the desk in the south-east room of the basement for a new one.

056 min

Walkthrough, Stage by Stage

Steps follow the OSRS Wiki quick guide order. Dialogue choices that matter are listed in brackets. The wiki has a solution map for each chest if you want to check a mirror position against a picture.

1
Entering the temple.
Speak with Arianwyn in Lletya.
2
Ironmen without a death talisman: search the Lletya bookshelves for the book Prifddinas' history.
It can be the random book on Thorgel's list later, which saves a trip and a teleport charge.
3
Wearing your mourner gear, talk to Essyllt in the Mourner HQ basement (north-east corner of West Ardougne). He gives you the new key.
4
Go through the door in the west wall of the basement and run west down the tunnel past the level 182 dark beasts, praying Protect from Melee, until you find the dead bodies. There will be a cutscene.
5
Search a guard corpse for Edern's journal.
6
Enter the temple to the west.
Take the eastern stairs just inside the entrance up to the middle floor and the ladder in the south wall up to the top floor. Cross to the northern part of the top floor by the middle stairs; the black crystal is to the east.
7
Use your chisel to chip off a piece.
8
Return and talk to Arianwyn in Lletya to enchant your crystal.
9
Chest #1.
Go back to the Temple of Light.
10
Take the eastern stairs, straight ahead of the entrance, to the middle floor.
11
Use your rope on the rocks marked with a rope on the wiki's chest #1 map. It frees a slot and becomes your shortcut down to the bottom floor for chest #4.
12
Drop your new key.
13
Head to the area marked with mirror #1 just east of the stairs.
14
Pull the crystal dispenser on the wall to reset the puzzle, then collect the items:
mirrors and a yellow crystal. (dialogue: Pull the lever. → Pull it. → Take all the items.)
15
Place Mirror #1 to shine the light north.
16
Mirror #2 points west.
17
Mirror #3 points south.
18
Place the yellow crystal.
The light will turn yellow.
19
Mirror #4 points east.
20
Cross the gap to the other side, using any Agility boosts you have (you cross this gap again later), and open the chest for 2 mirrors and a cyan crystal.
21
Chest #2.
Reset the dispenser and take everything: you now have 6 mirrors and 2 crystals. Mirror #1 north, #2 west, then the cyan crystal at the next junction (the light turns cyan). Mirror #3 north, #4 east, then the yellow crystal (the light turns green). Go through the magenta barrier and open the chest for 2 mirrors. Do not reset.
22
Chest #3.
Walk back west and take the yellow crystal off its pillar; the light goes back to cyan. Put mirror #5 on that pillar pointing up, long side east. Climb the north ladder to the top floor and set mirror #6 west. The light turns blue as it passes the pillar to the west.
23
Go back down to the middle floor and up the south ladder to the top floor.
In the north-west corner, set mirror #7 pointing down, long side east.
24
Go down the south ladder and the east stairs to the bottom floor.
In the north-west corner, mirror #8 is already placed, so you can walk through the yellow barrier. Turn #8 south, go through the second yellow barrier and open the chest for 2 mirrors and a fractured crystal. Do not reset.
25
Chest #4.
Turn mirror #8 east, leave through the eastern barrier and take the east stairs to the middle floor. On the pillar between mirrors #2 and #3, swap the cyan crystal for the yellow one; the light turns yellow.
26
Climb the south ladder to the top floor.
Rotate mirror #7 in the north-west corner to shine south (the light is red here), then run south and place a new mirror #8 pointing down, long side north.
27
Go down the south ladder to the middle floor and use your rope shortcut to the bottom floor.
Mirror #9 is already placed, so you can pass the cyan barrier and open the chest for a blue crystal.
28
Chest #5.
Reset the dispenser: you now have 10 mirrors and 4 crystals. Mirror #1 north, #2 west, #3 south, the yellow crystal to the south (the light turns yellow), then #4 east. Cross the gap, go through the blue barrier and place the blue crystal, not the cyan one.
29
Cross back over the gap.
Pick up mirror #4 and turn #3 to point up. Climb the south ladder to the top floor, place #4 in its new spot pointing south, then place a fractured crystal. The beam splits three ways.
30
Set mirror #5 to send the western beam down (long side east), #6 to send the southern beam east, and #7 pointing down (long side west).
31
Go down the south ladder and the east stairs to the bottom floor.
Where green light comes through the ceiling, set mirror #8 south and #9 east. Cross the magenta barrier, set #10 north where blue light comes through the ceiling, then go through the yellow barrier and open the chest for 3 mirrors and a second fractured crystal.
32
Death Altar puzzle.
Reset the dispenser: 13 mirrors and 5 crystals, and you will not use the cyan one. On the middle floor, set mirror #1 north and #2 pointing down, long side south.
33
Take the east stairs to the bottom floor.
Set mirror #3 west, then a fractured crystal to split the beam. Mirror #4 sends the northern beam up. Put the second fractured crystal on the southern beam, then set #5 to send the western beam up and #6 to send the eastern beam up.
34
Climb the east stairs to the middle floor and put the yellow crystal on the white beam to the north.
Climb the north ladder to the top floor and set mirror #7 west; the light turns red at the pillar to the west.
35
Go down the north ladder and up the south ladder.
Mirror #8 sends the green beam west, #9 sends the white beam west and #10 sends the white beam north.
36
Cross to the north part of the top floor by the middle stairs.
Mirror #11 sends the white beam west and the blue crystal turns it blue. In the north-west corner, #12 sends the red beam south and #13 turns the light east.
37
Go down the middle stairs twice to the ground floor, pass the cyan barrier and rotate the pre-placed mirror #14 so the red light shines west. The black barrier in front of the Death Altar turns white and opens.
38
Go through to the Death Altar.
39
When you're ready to leave, make sure to turn Mirror #14 back towards the entrance door, otherwise to get back in here you will need to go through the Underground Pass.
40
Finishing up.
If you do not have a death talisman/tiara or catalytic talisman/tiara, hand Thorgel the 50 items on his list: 47 set items plus one random ticket, one random book and one random key. Expect more than one bank trip.
41
To walk back to Thorgel from the entrance, go up the eastern stairs, then south and up the ladder to the top floor, then down the middle stairs twice to the altar.
42
Bring the newly made crystal from the start of the quest.
43
Enter the Death Altar.
44
Use the uncharged newly made crystal on the altar.
45
Use the charged newly made crystal on the black crystal on the top floor.
46
Travel to Lletya.
47
Speak with Arianwyn.
48
Finish the closing dialogue to complete the quest.

If you leave in the middle of a puzzle, everything stays where you placed it, so you can bank for food and come back. The mirrors and crystals themselves cannot be banked.

How the Temple of Light Puzzle Works

The whole quest is one light puzzle split into stages across the bottom, middle and top floors. You change the beam's direction with mirrors and its colour with crystals, and each stage ends at a chest that gives you parts for the next.

Table 3Puzzle pieces in Mourning's End Part II5 rows

Piece	Type	How it works
Mirrors	Direction	Each mirror points the beam one way: north, south, east, west, up or down. Rotate it after placing until it matches the step you are on.
Coloured crystals	Colour	A placed crystal changes the beam's colour. You get yellow, cyan and blue crystals during the quest; red, green and magenta crystals are not obtainable.
Fractured crystals	Special	Used in the later stages and in the final Death Altar setup. Chests #3 and #5 each give you one.
Agility gaps	Agility	Crossed in the first and fifth stages. Food is mostly needed here if you pray against the shadows; 91 Agility never fails.
Mirror #14	Final step	Point it west to reach the Death Altar. Turn it back toward the entrance when you leave, or you will have to come back in through the Underground Pass.

You need 4 free inventory slots for the first steps of the puzzle, rising to 13 for the last stage.

Shadows and Dark Beasts

There is no boss and no required kill. Two monsters still cost you supplies if you ignore them.

Table 4Monsters on the way2 rows

Monster	Attacks with	Pray	What to do
Shadow (level 73)	Melee (crush)	Protect from Melee	Aggressive to anyone inside the temple. Prayer bonus gear stretches your prayer potions, and the wiki suggests a maple blackjack(d) switch for extra crush defence.
Dark beast (level 182)	Crush up to 17, Magic up to 8	Protect from Melee	In the tunnel on the way to the temple. They are aggressive and ignore tolerance, so pray and run past.

For a full trip, the wiki suggests about 20 prayer potion doses at 61 Prayer and 12+ doses of stamina potion.

Rewards and Unlocks

Most players do it for the 60,000 Agility XP and because Song of the Elves needs it. Death Altar access also matters for Runecraft and the hard Ardougne Diary.

Table 5Experience and rewards5 rows

Reward	Detail
Quest points	2
Experience	60,000 Agility
Item	A crystal trinket, which lets you enter the Temple of Light again after the quest
Runecraft	Access to the Death Altar; death talismans and death runes through Guardians of the Rift
Slayer	Access to dark beasts, and the Dark Beasts teleport on the slayer ring

What it opens up

Song of the Elves, once Making History and Druidic Ritual are also done
Death runes from the Death Altar (65 Runecraft)
Dark beasts as a Slayer task location

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

Common Mistakes and Warnings

Check these before every trip into the temple.

Entering with too few free slots for mirrors and crystals.
Trying to bank temple mirrors. You cannot; leave them placed and come back.
Walking through the temple without prayer potions and dying on a solved floor.
Forgetting the rope, the new key or a piece of mourner gear on a return trip.
Leaving Mirror #14 pointing west, which forces you back in through the Underground Pass.
Ignoring weight and stamina until every floor change becomes a slow walk.
Reaching the altar step with no death talisman, catalytic talisman or tiara.

Ironman Notes

Without a death or catalytic talisman, Thorgel will take a list of 50 items instead: 47 set items plus a random ticket, book and key. It is slow, which is why the wiki suggests it mainly for ironmen. The catalytic talisman is a 1 in 200 Rewards Guardian drop from Guardians of the Rift.

Pick up the book Prifddinas' history from the bookshelves when the walkthrough mentions it. It can count toward the 50 items and save a trip.

Bring one pure essence to craft a death rune at the end. It needs 65 Runecraft (boostable) and counts for the hard Ardougne Diary.

FAQ

What are the Mourning's End Part 2 requirements?

No skills for Part II itself. You need Mourning's End Part I, which needs 60 Ranged and 50 Thieving, and the elf chain behind it up to Regicide.

Is MEP2 harder than Song of the Elves?

MEP2 has no skill checks and no boss; it is one long light puzzle with level 73 shadows chipping at you. Song of the Elves needs eight unboostable 70s and ends with the Fragment of Seren.

Can I leave mid-puzzle?

Yes. The puzzle stays exactly as you left it. The mirrors and crystals cannot be banked.

Do I need full mourner gear?

Yes. It is on the required list, and you wear it to collect the new key from Essyllt.

What should I train first?

Prayer to 43 for Protect from Melee, then Agility. 75+ makes the gaps far less painful, and summer pies help below that.

Is this required for Prifddinas?

Yes. Song of the Elves, which restores Prifddinas, needs Mourning's End Part II.

Still stuck on a mechanic? Ask the team on our Discord, it is free.

Sources

Numbers and mechanics on this page come from these 11 OSRS Wiki pages:

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OSRS Mourning's End Part 2 (MEP2) Guide: Temple of Light

The short version

Overview

Requirements and Prerequisites