Between a Rock...

Official quest description: Hidden away from the fearsome trolls and the roaming Fremennik, the dwarves delve deep beneath the mountains in search for the ore they need to support their home of Keldagrim. One dwarf in particular, however, has for years been trying to crack open a rock that seems to be impervious to any material that he's tried on it. Convinced that solving the riddle of the rock will lead him to unimaginable wealth, he has spent the latter part of his life on just this lump of stone. Help him out, but take care you don't end up in a tight spot!
Release date: 21 March 2005
Start: The Keldagrim mines east of Rellekka north of the mountain camp.
Difficulty: *****
Length: Medium
Members only: Yes
Requirements:
30 defence
40 mining (higher mining being an advantage)
50 smithing
Able to defeat a level 75-125 enemy (combat level of enemy dependent upon how much gold you mine)
Dwarf Cannon (quest)
Fishing Contest.
Items needed:
A pickaxe
Around 830 coins for cart and ferry rides (or a ring of charos (a) for half the price of the cart rides and free ferry rides)
4 Gold bars
A Hammer
An Ammo mould (can be bought for 5 coins during the quest)
Recommended:
Lyre
Ring of Charos (a)
Monsters to kill:
A level 75-125 Arzinian Avatar
Spoiler warning: Plot and/or ending details follow.
Walkthrough
Start the quest by going to the Keldagrim mines which can be found northeast of Rellekka. Upon entering the cave, right across from you is a crack between two dwarf statues, which you should enter. From there, talk to the Dwarven Ferryman for a ride across the river, which will cost 2 coins; Or free if you have a Ring of Charos (a) equipped.
To your north is the quest start, but to get there go east and around the rock wall. Speak to Dondakan to commence the quest.
Dondakan will ask you to get further information about the rock, so return to the other side of the river, paying 2 coins again, or crossing for free with the ring. This time, speak with the boatman to be taken to Keldagrim. If you have not started The Giant Dwarf, you will be presented with a small cutscene, introducing the area.
To the south of the boat landing is the Trading Consortium. Enter this area and go up the stairs. Go to the west side of this floor and go down those stairs. Look for the area with an anvil on the mini-map -- inside the Consortium walls, not the one outside -- and speak with the Dwarven engineer.
You will be told to speak with Rolad. Go back to the east side of the Consortium. Exit the Consortium and go in a southern direction until you find the mine carts. Pay up 150 coins for a ride to the Dwarven Mine at Ice Mountain. Head south, east then north to the ladder leading to dwarves at the surface west of barbarian village (not the Falador exit). Exit to the surface south of Ice Mountain, (If you have completed the Perils of Ice Mountain quest, head due north and take the ladder. Then head east.)
There will be two buildings in front of you. Go in the eastern-most one and speak with Rolad. He will ask you to find the pages from a book giving you information about the rock. If you do not have a cannonball ammo mould, go to the other building and buy one for 5 coins from Nulodion.
All 3 pages are found in the dwarven mine :

One of them can be found when searching the mining carts. (You may have to search all of them.)
Another is found when killing scorpions (may need to kill more than one).
The final one is found by mining any ore (may need to mine more than one).
Return to Rolad when you have found all 3 pages, and he will give you the Dwarven lore. When you have the choice, answer 'Of course.' Do not lie to him. Read the book, and then keep it for later.
Head back to Dondakan (via the mine carts, Boatman and Ferryman) and speak with him. He wants a material that is stronger than rune and granite. This is where your gold bars come in handy.
Go to any furnace with 1 gold bar (you need the other 3 for later) and your cannonball ammo mould, and make a golden cannonball. The closest furnace is the one in Rellekka, which you can use if you have completed The Fremennik Trials. (Lyre time.) Another option, assuming you have the ability to use the Fairy Rings, is to use the fairy ring located northeast of the Keldagrim Entrance, there's a furnace in Zanaris, where you can quickly craft your cannonball then use the fairy ring code DKS to return to the Keldagrim Entrance. Alternatively you can teleport to your house (if in Relleka) use glory teleport to edgeville and use the edgeville furnace (needs varrock diary armour) Teleport back to your house and walk back to mines.
Use the cannon ball on Dondakan. When he fires it, the cannonball will disappear through the wall. He will then ask to fire you through the wall, but needs the schematics to change the cannon to be able to fire a human. You will also need to make yourself a gold helmet if you don't want your head to explode when you hit the wall.
There are a set of 4 schematics:
The first schematic, Dondakan gives to you
The second one, schematics, is given by the Dwarven engineer back in Keldagrim (In the West side of the consortium). You can make your gold helmet (note a gold helmet adds 24 kg to your over-all weight) while you're here, use 3 gold bars on an anvil (don't forget your hammer). (The anvil may be difficult to spot. It is in the northeastern part of the room.)
Go back to the eastern part of the city to the mine carts, and this time, take them to White Wolf Mountain (this ride costs 100 coins for one trip). Go to the bar area and speak with Khorvak. He will ask for a Dwarven stout. Take one off the table and use it on him, and in return, you will receive the final schematics.
Read to the last page of the Dwarven lore book and you will find Base schematics, this will destroy the book.
Once you have all the schematics, click 'assemble' on any of the 4 pieces. You will be shown all schematics, but they will not make any sense. What you must do here is move, and/or rotate, the schematics one by one so that they fit with the Base schematic. This part is simple pattern recognition. The schematics can be manipulated one at a time via the checkboxes. Once you put them all in their proper places -- it will take some trial and error -- the screen will show: ”That's it! It all makes sense now! If you were a dwarf, that is...”.


Second Thoughts

Too late!
Equip the gold helmet and go back to Dondakan with the schematics, your pickaxe, and any items you feel might be needed to kill a level 75-125 enemy. Once you are ready, ask Dondakan to shoot you into the rock.
Once inside the rock, you are surrounded by gold ore and gold veins. Mine as much as you can; If you mine 15 gold ore, the enemy will be level 75; If you mine at least 5 ore without mining 15, the enemy will be level 125; With less than 5 ore, you cannot defeat the demon.(Note: you only have 8 minutes in here, so be swift). When you feel you have enough gold, go to the centre of the area, where you will find a set of flames. Go through the first set of flames -- do not dally or you will take damage -- and talk to the second set. While talking to the second set of flames, the Arzinian Avatar representing the demon will come and attack you. The spirit will attack with mage, melee or ranged, depending upon which is your weakest.

Fighting the Arzinian Avatar
You can use prayer for an easy fight, the spirit shouldn't take too long to kill. If you are close to dying, you can take your gold helmet off, which will teleport you outside of the rock, next to Dondakan. (And you will have to try again from scratch.)
When you have defeated the Spirit, you will be teleported back out of the rock. Speak to Dondakan to finish the quest.