Within the Light

To get to Lletya easily, use a crystal teleport seed, a Tirannwn quiver 1, or pass through the forest from Tirannwn lodestone.

With your mourner gear equipped, enter the Mourner Headquarters in the north-east of West Ardougne and climb down the trapdoor.

If you need the keys, search the Head Mourner's desk in the basement's south-east room for the tarnished key and new key.

Enter the tunnels with the new key and run to the west to approach the Temple of Light.

Remove your gas mask and chant-to the blank teleport crystal in your backpack, whilst standing east of the first slave on the square directly between the north and south crates (picture for reference).

After the cutscene, return to the room next to the Head Mourner's office.

Talk to the gnome.

Ensure the tarnished key is in your backpack or you will not be able to open the door to the gnome.

Talk to Head Mourner if you want to honour your deal.

Optionally for the second set of mourner outfit, you can kill a mourner nearby.

Return to Lletya.

Use a piece of mourner's outfit on Arianwyn.

Use the enchanted crystal on Arianwyn.

Bank for food to fend against shadows.

Talk to Arianwyn and accept the teleport. Dismiss your pet or familiar if you have any.

Make sure to have a second set of mourner gear to hand in, if not done earlier, talk to him again once he is dressed.

Proceed to Thorgel in the temple. Do not teleport out of the room to the death altar until rotating the red beam back the way it started, or else the light door will be locked on return.

Go up the stairs to the west, up the stairs to the south, down the stairs in the centre, down again, and through the light door. Rotate the red beam west and go through another light door.

Do not use death altar teleport at this point unless you are absolutely certain the light beam is situated to let you out of the altar room.

Talk to Thorgel near the death ruins.

Talk to Arianwyn.

Investigate the energised pillar (east multi-coloured 4-beam pillar).

Talk to Arianwyn.

(Epilepsy warning about 2s duration) Use the crystal trinket on the energised pillar.

Talk to Arianwyn.

Speak to Arianwyn again if you need a death talisman.

Enter the death ruins.

Remember the following steps and do them quickly, or you'll have to try again:

Talk to Thorgel to become energised.

He is south of the altar, and does not appear as a yellow dot on the minimap.

Exit the altar.

Pass the door of light.

Rotate the first pillar of light mirror by the stairs.

Go up the first stairs and immediately take the stairs to your left (north).

Run all the way east then south to the large crystal and investigate it. (If it speaks, you were not fast enough and have to go back to Thorgel.)

Run back down the stairs and touch the energised pillar. (If you don't get transported, you were not fast enough.)

For this puzzle the position of the receivers differ from player to player. Make sure you have time available to complete the following portion of the quest, as it is instanced; i.e. if you log out, return to lobby, or die, you will appear back at the death altar room.

Once inside, search the dead slave on the ground.

Chop, then fix the eastern crystal tree with the blue light beam.

Solve the puzzles by reflecting the light beams to the opposite coloured receivers. You only have one receiver available at a time.

For example: if the receiver in the end is yellow and since the opposite of yellow is blue (refer to the colour wheel), you need to direct the blue light beam to the yellow receiver. Due to how mirrors reflect, you often have to reroute, just keep trying different paths for the quickest solution.

Refer to the in-depth guide if you cannot figure it out.

Redirect the blue light to the yellow receiver. This enables the red light.

Redirect a combination of red and blue light to the green receiver. This enables the green light.

Redirect a combination of blue and green light to the red receiver.

Redirect all three colours to the colourless receiver. When done all receivers on the western wall will be white. See below for example solutions.

Exit using the ladder in the south-east (not the portal).

If you die, your grave will appear behind the energised pillar. To get there, teleport to the death altar through the death rift in the Abyss or the death altar teleport if the door to the altar is unlocked. You will have to repeat the energisation process again to re-enter the platform puzzle area. Progress of the light puzzle will also be saved.

Reach the platform with the ballista by jumping between the platform and trying to avoid the spikes in the floor.

Shoot it at the right time to hit the target.

Go back the way you came and jump to the ladder.

Go-through the large stone door on the west wall.

Search the Elf messenger.

Read the report.

Important: Before you leave the temple, rotate the mirror of the red beam back to the east, so that when you return to the Temple again, you will be able to access the Death Altar room.

Now is your last chance to inquire about saving the Gnome, if you intend to (it's completely optional).

Return to Arianwyn in Lletya and give him the report.

Quest complete!