This guide is suitable for current RuneScape and Old School.
Head northwest of the Gnome Stronghold until you find two people wondering around, Devin Mendelberg and Kathy Corkat. She will refuse to take you up there because it is too dangerous. However, you can bribe her 50gp for a ride or persuade her too by using the (charm) option if you are wearing the Ring of Charos(a). Alternatively, use the fairy ring code AKQ and head north. Upon arrival, speak to Herman Caranos.
He will tell you that the Colony is being attacked by Sea Trolls, and they need a experienced helper. He will ask you to go and talk to the Wise Old Man in Draynor Village. Head to Draynor Village and talk to the Wise Old Man. He will agree to do it as it will be his Swan Song. Before he will leave, he will ask for 5 Blood runes, 10 Lava runes and 10 Mist runes. Give those to him and he will tell you that he will meet you back at the Colony.
Note: Fight ahead, several level 79's in a multicombat area.
Head back to the Colony and talk to Wise Old Man. You will then climb through the hole to enter the Colony but will be ambushed by Sea Trolls. You will have to kill ten. The Wise Old Man will assist you in battle, but will run out runes. You can use Lava and Mist runes on him to supply him with more.
Once the battle is finished, enter the Colony and head to Herman Caranos's house, and talk to him. His house is the first on the eastern side. He will ask you to help out Franklin and Arnold whilst he and the Wise Old Man discuss battle plans. Head outside the house and talk to Franklin. He will tell you that you need to make 5 iron sheets to repair the broken wall. Enter the house with the furnace symbol, and place one log in the firebox, and then light it with your tinderbox. Now use the iron bars on the metal press to make them into iron sheets. After you have made the iron sheets, head to the northwestern side of the Colony and fix the broken walls.
Now enter the building with the bank symbol above it. Talk to Arnold and he will ask you to fish him 5 fresh Monkfish and then cook them for his store. He will give you a small fishing net. Head to the western side of the shore and fish in the fishing spot. Whilst you are fishing you will attract three different Sea Trolls of different levels, up to level 101, which you will have to defeat. After you have finished fishing the five Fresh Monkfish, you will need to cook them on the range and then take them back to Arnold.
Now go back and talk to Herman Caranos. He and the Wise Old Man will tell you that they have decided the best way to attack the Trolls is with a army, and will ask you to go and talk to Wizard Frumscone in the Yannile Magic Guild to see if he will lend some of their Zombies. Head to the Wizard's Guild and enter the basement. Talk to Wizard Frumscone and he will refuse, but will tell you to talk to somebody else called Malignius Mortifer in Falador, who might be able to help. Malignius Mortifer is south of the Air Temple near Falador, and is surrounded by elemental Mages. Talk to him and he will tell you that he will raise a army of Skeletal Magi for you.
Note: Fight ahead (level 170)
The Sea Troll General
He will tell you that he will need 7 bones. Give them to him and he will make them into Bone Seeds. Then he will suggest that you talk to somebody within the Crafting Guild to ask about what you could carry the Bone Seeds in. Enter the Crafting Guild and talk to the youngest Master Crafter. He will suggest using a airtight pot. Head back to Malignius and he will seal the Bone Seeds in your pot with the pot lid. He will then teleport you back to the Colony.
Enter the Colony and talk to Herman. You will hand over the pot of Bone Seeds and then the Wise Old Man will you warn you that the fight is about to start, and will ask if you need to get ready. The fight will begin and the army of Skeletal Magi will quickly finish off the first wave of Sea Trolls. Then the Wise Old Man will attack a Sea Troll General and will become injured and ask you to finish the last fight. The Sea Troll Queen uses a magic based attack, and will drain some of your prayer at the start of the fight.
Once you have defeated the Sea Queen, go back and talk to Herman.
Congratulations! Quest Complete!
Guide Made by: DaDa
Corrections submitted by: DaDa, Jei, Dark, Syntack, Power of Five, Sytze