Twilight of the Gods

To get there, you may use the Archaeology journal teleport and run north.

Enter the nearby ancient door.

Do not use the pontifex ring's Senntisten teleport as it will exit the instance.

Talk to Naressa or Gregorovic in the house near the southwest corner of Senntisten and agree to meet them in the asylum.

Talk to Naressa or Gregorovic once inside.

Talk to them a second time and pull the crane lever under the desk, not the lever on the wall.

Head up the stairs.

Search the drawer (not the chest of drawers) near the filing cabinet for a chain of keys.

If you cannot find the keys, head downstairs and flip the lever again (see image). If you still cannot find the keys, search the crate, then the bookcase upstairs and the drawer near the filing cabinet should be interactable.

Search the notes on the ground to the east for key instructions then read it.

Head downstairs and open the gate, then walk through it.

Operate the asylum elevator.

Talk to Naressa and Gregorovic.

Head east into the next room and talk to one of the abyssal savages, then talk to Yk'Lagor, Cyrillus or Dahaka.

If you teleport out at any time, you will have to re-enter from the surface entrance north of the Varrock Dig Site.

Find Rowena (little girl ghost) starting at the south-east.

Follow her through the dungeon and collect the following items from the area.

Syringe from the crate of syringes in the incinerator room (south).

Infernal ashes from the spiky chair several rooms later (west). It is in small rectangular room with a single abyssal savage.

Vial from the crate of vials in the nothernmost room.

Talk to Senecianus (appearing as Rowena) in the north-westernmost room to obtain a Break Curse scroll (Twilight of the Gods).

Create the cure:

Use the syringe on Senecianus to obtain a Syringe of Chthonian blood.

Fill the vial using the sink in the southwestern operating room to obtain a Vial of vile water.

Right-click to use the infernal ashes on the vial to obtain Experimental potion 6.

Use the blood syringe on the incomplete potion to obtain a SIPD cure.

Return to the large northeasternmost room and talk to Yk'Lagor.

Talk to Yk'Lagor again.

Talk to Saradomin on his throne in the White Knights' Castle in Falador.

Talk to Saradomin again.

Talk to him a third time.

After finishing the last dialogue, your quest journal should mention "The White Knights in the Jolly Boar Inn" as the current step.

Talk to the four white knights at the Jolly Boar Inn.

Sir Cull

Sir Berus

Sir Dated

Sir Plus

Just west of the inn, descend the lift to enter the Infernal Source Dig Site.

Talk to Blythe.

Wear the cultist attire and climb down the secret passage to the north.

Pickpocket cultists until you obtain a cast iron key (pickpocketing the same one works).

Collect information about the cult:

Head north and talk to Wilona.

Talk to Audrey (near the east pillar).

Talk to Ridley (in the east hallway).

Talk to Edda (in the southeast room).

Search the crate against the southern wall for spare cultist robes.

Talk to Tyne in the jail cell west.

Return and talk to Saradomin.

Talk to Saradomin again.

Talk to him a third time.

After finishing the last dialogue, your quest journal should mention "re-establishing the Edicts of Guthix" as the current step.

Go downstairs and talk to Adrasteia in the room to the west.

If she is not there, you may lobby and log back in.

Talk to the Tree of Balance south-west of the Archaeology Campus.

Talk to any of the guardians of Guthix for a cutscene.

Return and talk to Saradomin to obtain an Energy scanner.

Scan with the energy scanner, then go to the Memorial to Guthix

You can teleport directly to the Memorial using either Sixth-Age circuit or by using memory strand from the currency pouch

Stand in front of the pool and talk to the Archivist if he is visible near the pool.

Scan with the energy scanner, then go to the gleaming wisp divination site south-east of the Karamja lodestone and interact with the green mystical wisp.

You can use the elder divination outfit for a direct teleport to the gleaming wisp colony, or Karamja gloves 3 or higher to teleport nearby to the Shilo Village mine.

Talk to the confused automaton and complete all the dialogue.

Exit the cache and scan with the energy scanner, then talk to Merethiel at the Lost Grove.

You can use the Boss portal to Solak, fairy ring if repaired (Take 5 Bittercap mushroom to repair it if you have not) and then interact with the magical mushrooms, the elder divination outfit to the incandescent wisp colony, or and then run west to the standstone to get to the Lost Grove.

Talk to the Guardians of Guthix once inside.

Talk to Isaura at the Black Knights' Base (northeastern corner of the base, next to the kitchen) in the Taverley Dungeon for a crate of birds.

You can quickly get to her using the Archaeology teleport or the master archaeologist's outfit teleport to Collectors, then Isaura. (→)

Return to The Lost Grove, then talk to Merethiel.

Speak to Juna once inside.

Place effigy on the stone circle in the middle of the arena.

Harvest from the energy spring until you have 52 Guthixian energy.

Make all of the letters at the offering cradle (the large orb in the middle of the area).

Collect four stone circle building kits from the material cart slightly north-east of Juna and construct four empty stone circles starting from the west.

The spelling of 3 words is required for each of the 3 rituals (9 total).

For each ritual phase, the order of words is random per player.

To spell words, add a rune (letter) on each of the stone circles you've just constructed.

Words are spelled in clockwise orientation on the stone circles along the perimeter of the arena.

To attempt the word you spelled, place effigy on stone circle, followed by "start ritual".

Each successful ritual phase will yield the chat message:

In the first ritual, the words are; in no certain order:

H A L T

W A R D

G O D S

Talk to Juna.

Collect from the material cart again and build the 5th stone circle.

In the second ritual, the words are; in no certain order:

L E A V E

A N I M A

A E G I S

Talk to Juna.

Collect from the material cart again and build the 6th stone circle.

In the third ritual, the words are; in no certain order:

B A N I S H

S H I E L D

D I V I N E

Talk to Juna.

Return to Saradomin's throne at the White Knights' Castle at Falador and speak to Adrasteia.

Talk to Adrasteia again.

Go to the Empyrean Citadel (Adrasteia offers to teleport you).

Alternatively use the invitation box.

Talk to the gods.

Interact with the fake quest completion certificate and talk to the voices in your head.

Quest Complete!