The Curse of Arrav

Mining the Tunnel
'''Items required for this section: To start, talk to Ali the Wise in his house in the North-West of Nardah. After talking with him, your character learns of a tunnel on Trollweiss Mountain. Using the Trollheim teleport, go to Trollheim mountain. Make your way off the mountain and go North-West along the path until a path breaks off North.
 * Pickaxe,
 * Climbing boots (If you cannot use Trollheim teleport (after Eadgar's Ruse)).'''
 * Food/Armour for killing a level 180 NPC

Go North through the tunnel, running past the Level 122 Ice trolls and exit the cave. Head east to another cave and go inside. You will now be in a series of tunnels. Go through, clearing the rubble as you go. Many pieces of rubble will need to be mined from 2 or more sides. Collect the four stone tablets in the tunnel maze. You can bank the tablets for use after quest completion.

Once you make in to the basement, search the eastern bookcase closest to the ladder to get Zemouregal's notes (A-J) about the Mahjarrat, and head up the stairs.

There you will find Arrav. Speak to him, but he can't control his mind, so he starts to attack you. He has a combat level of 180 and attacks with Melee, so Protect from Melee is suggested. You will deliver a few blows, with him talking in between each. When Arrav has 50% of his health remained, he'll teleport away, and he tells you to search the flame tapestry in the southern room. Head to the room and search the tapestry on the western wall. You must have 2 free inventory spaces to do this. You will receive a key and the base security plans.

Preparing the Jar

 * 3 sets of Dwellberries
 * Sacred oil (1)
 * Ring of Life

Now, head back to Ali the Wise in Nardah. Show him the plans and see a cutscene/walkthrough of the base. Now, head South-East in the pyramid to speak to the Pharaoh Queen from Missing My Mummy, she will tell you how to make a jar to preserve Arrav's heart and give you a Canopic Jar. The Canopic Jar will then need to be filled with Sacred oil(1 dose), 3 dwellberries, and a ring of life.

Saving Arrav's Heart
Go back to talk with Ali, and you will find out that you will need 'insulation' (Insulated boots), a way to remote view (a Macaw pouch or a Ravenous locust), a Rope, a mithril crossbow or better, and a Mithril grapple.

Go to the Chaos temple in the wilderness just north of Varrock, go down the trap door into Zemouregal's base and run all the way past the hostile zombies to the previously unopenable door at the end. With the base key obtained earlier from behind the tapestry, this door will now open. Go into the small side room with the pipe, equip the Insulated boots and enter the pipe. With the boots equipped, the sewers are completely safe. If the boots are not equipped or taken off anywhere in the sewers, your character will be sent back to the entrance of the sewer and hit for around about 15 damage.

At the end of the sewers, there is another pipe. Summon the macaw, stand in front of the pipe and interact with it to access remote view and then run through the south room after the cut-scene. Search the tables for decoder strips and Notes (k-z), and then pick the lock on the chest for the code. Then, read your pass key and make a note of the four-letter code. With the decoder strips, go back north to the big door and interact with the keypad next to the locked door.

Select strip #1 and using the arrows to the right, put strip #1 over the line indicated by the first letter of the code and enter the number shown through the hole. Repeat this for the other three strips and their respective pass code letter. For example, if your pass code is ABCD then you would place the decoder strip #1 over the A, and the remaining number will be the first digit in the code to unlock the door. Repeat this for all the numbers, then you should hear a latch open then open the door. Note: If you don't do within 5 minutes, the zombies guards will come back and kick you out the room.

Use your mithril grapple on the pipes above to bypass the trap and take the heart out of the magic fire and you will automatically place it in the jar. Teleport out and go talk to Ali the Wise to complete the quest.

Reward

 * 1 Quest Point
 * 30,000 Experience
 * 14,000 Experience
 * 9,000, and  Experience
 * 4,000 Experience
 * 2,500 Experience

Additional Research
You can talk to him afterwards and give him additional information, but there are no rewards for doing so. To give him all the information you'll need to have gathered: The 4 Tablets in the tunnel and the two notes of mahjarrat names, A-J and K-Z. You can also give him information from the following quests:
 * Desert Treasure
 * While Guthix Sleeps
 * The Tale of the Muspah
 * Defender of Varrock
 * Hazeel Cult
 * Temple of Ikov
 * Enakhra's Lament

Trivia

 * When this quest was first released the spoilers read: "Like Arrav, the rewards are cursed! Please check back tomorrow - we have our best exorcists, soothsayers and alchemists working on the problem."
 * Upon the release of a quest, two different sets of requirements were given until Mod Nexus confirmed the requirements in the knowledge base are correct.
 * When a player has the security systems within Zemouregal's base explained to them, they will respond "Well that sounds an awful lot to get past. It sounds like an impossible mission!" which is a reference to the Mission: Impossible television series and films.
 * This quest provides the highest mining experience of any quest, not including optional experience.
 * When a player returns to Ali the Wise after retrieving the heart, Ali says "So, how is the great heart robbery coming along?" This is a reference to the quest "The Great Brain Robbery" which, in turn, is a reference to 'The Great Train Robbery'.
 * When Ali the Wise mentions you should bring surveillance, the player says: "Sir Veylantz? Is he one of the Temple Knights?"