- This quest has a Quick guide
The Ancient Curse is a quest which entails helping out the Queen of Arigon. Completion of this quest will unlock the Ancient Curses prayer book.
- Start point: Queen of Arigon
- Difficulty: Hard
- Length: Long
- Requirements: Recipe for Disaster, Love Ballad,
30 Defence, 
50 Prayer and 
90 Woodcutting - Items required: Spade,Stamina potion and a mostly full inventory of good food
- Enemies to defeat: Elite demon (pray melee),Demon Lord (pray melee and stay high hp)
Walkthrough
To start the quest, talk to the Queen of Arigon, who can be found east of the AFK arena at Home. Bring a spade with you.
The Queen will then ask you to go to see Effigy (an NPC). Effigy can be found just outside of the Tower of Life. Teleport to Ardougne (Cities > Ardougne) and run to the south-east.
Effigy will instruct you to go to Canifis and speak to the Half-soulless. Teleport to Canifis (Cities > Canifis) and run west towards the bridge.
The Half-soulless will tell you to go North towards the Slayer Tower to find a farm to its east. Enter the house and search the crate directly north of the door. Then go back outside and dig (with your shovel) next to the east-facing window to find the Mask part 4.
For this next part make sure you bring a stamina potion and protect melee, and a mostly full inventory of food (sharks works fine, leave two spaces free), and go back to Effigy. He will talk to you and send you to a maze.
Warning: If the helm is not worn, then after 3 minutes your insanity will build up and will instantly kill you. This will result in a HCIM death
Make your way all the way through the maze, to the very top right. You will figure it out after 1 or 2 tries. The end part is in the Elite Black Demon cave, you will pass these Black Demons and keep going into the corner. There will be a portal and a body to search. Search the body to find the last mask piece.
Once collected the piece from the skeleton cage, bring it to Effigy,
Get ready for a boss fight as you now have to kill one of the black demons from the previous tunnel, and then you will be teleported into a boss fight. We recommend brews and restores only. (and boosting pots like range pots or combat pots). Now he will give you a mask and teleport you back inside of the demon cave, wear the mask back to the very end of the maze again and kill a black demon, once the demon dies you get teleported to the final boss fight. There are two phases. Range works best. Stay out of melee distance and pray Ranged.
Once killed, talk to effigy, and then return to the queen or Arigon Quest Completed!
Rewards
The main reward for this quest is access to the Ancient Curse prayer book.