Step 1
Go to the village.
Talk to Bolren.
Go down the ladder.
Talk to Golrie.
Get the key.
Push the monoliths and get the key and shapes.

To begin, head to the Tree Gnome Village and talk to King Bolren in the center. After you talk to him, he will tell you to find an anti-illusion device somewhere in the village. Before you go ahead, make sure you have either your Crystal saw or Small crystal seed from the previous quest, Eye of Glouphrie, The. Next, go right outside the village, through the gate and down the ladder with the "!" icon. Take the west path and talk to the gnome Golrie.

Now you need a key to get into Golrie's storeroom. Head back east and go north until you reach another room, search the crates there and then turn back speak once more to Golrie. You can now enter his storeroom, head back to the second room and crawl through the tunnel on the north side. Push the first big monolith north and go around it. Push the next monolith that you can push north and then the one above that monolith east. Go around the chest and push the small monolith south. Push the big monolith west and attempt to open the mahogany chest. You will find that you cannot. Search the chests north of you to get some crystal shapes, Yewnock's notes and 'a key to a chest'. Use the 'a key to a chest' key on the mahogany chest.

Step 2
Go through the gate.
Solve the puzzle.
Talk to Bolren.
Talk to Aluft Gianne Jr, find Longramble.

Items needed: Good armour, food, watch, sextant, chart, small crystal seed/crystal saw, mithril grapple, Any crossbow, and prayer potions.

You will get a strongroom key, now to go around the monoliths and push the south one west and go west towards the gate. Use the key on the gate to enter. Here's the hard part, you have to try and solve the puzzle, if you need more shapes go back into the previous room and search the crates. The shapes in which you receive vary from person to person. You may have to exchange your shapes to get the right ones. Just follow what you did for the Eyes Of Glouphrie quest. The main point is to equal what's in there. The shapes' value is the number of sides on the shape multiplied the colour value according to the chart (Picture). So an orange triangle would be 3(sides) x 2(Colour value) = 6.

Once you've solved the puzzle, convert your Small crystal seed or Crystal saw into a Crystal chime using the glass bowl. Once done, leave the cavern, get some good armour, food, watch, sextant, chart, small crystal seed/crystal saw, mithril grapple and prayer potions and talk to King Bolren again. Kill the evil monster (Picture) and continue to talk. Now talk to Aluft Gianne Jr. in the Tree Gnome Stronghold, (Second floor, to the west [in the grand tree]) you can use the tree next to you. He will give you a set of coordinates. Here is where you need your watch, sextant and chart. Find the coordinates and go to them. To get there, go south of Castle Wars and then head far west, use your mithril grapple on the tree and swing across (Picture). Talk to Longramble (Picture). You may want you to give him some gnome food until he helps you. (If you bring Longramble his order, Tangled Toad Legs, he will give you a Mint Cake as a reward)

Step 3
Talk to spirit tree.
Find the elven magic.
Get the chimes, cure the tree.
Kill the terrorbirds.
Talk to Hazelmere.

Items needed: Small crystal seed/crystal saw, in addition to those needed for Step 2.

After you talk to Longramble head north and talk to the dead looking spirit tree. You will talk to Hazelmere and you will go through a cutscene. You will now need to find elven magic to cure the spirit tree. Now go back to the Tree Gnome Village and back to the cave with the monoliths.

Use the chimes on the tree for a cut scene. Now go west and south and enter the sewers. You can't teleport out of the dungeon. Walk past the warped tortoise and up the ladder. (It is strongly recommended that you avail yourself with range and melee protection prayer here, as you can dealt heavy damage without) Go into the area with the warped terrorbirds and follow it. Go around the "U" bend and down the ladder. Follow the path.

Go up another ladder and keep following the path past the warped animals, you'll get to a metal door. Go through it and around the "U" bend and down the ladder. Go east and up the next ladder, go west or east around the big hole and through the door. Now go to the east door and go through fight the terrorbirds (Picture). Use the chimes on them to be able to hit them. After you have used the chimes on them you can attack them.

Once you've defeated the terrorbirds, peek through the hatch door and you will see a cutscene. Hazelmere will come and rescue you from the gas (Picture), don't worry about dying. He will explain to you he is a mage and you will get your reward after.