Defender of Lumbridge

Walkthrough
To start, talk to Duke Horacio. Say you are looking for a quest. He will tell you that the goblins nearby are growing in numbers. He will tell you to go talk to the Melee tutor, who is next to a Yew tree on the road leading to Draynor Village. When you talk to him, he will say that goblins have inhabitated the whole place. He tells you though that he knows of a goblin secret base. Go back to Duke Horacio. Tell him about the base. He will tell you to go inspect it. Once back at the Yew tree, talk to the Melee tutor. He will ask you if you are ready. Say yes and a cutscene will show you and him getting inside. Once inside, go to the very end of the base. There will be a tunnel (similar to the Fist of Guthix one that leads you too the waiting room). Right-click it and click on the listen option. There will be a cutscene showing a 2 Goblin sergeants talking about the invasion. A goblin will pop up telling them the invasion force is ready. The cutscene then ends. The melee tutor will then tell you to get to Lumbridge now. Once in Lumbridge, there will be lots of level 2 goblins killing people. You are allowed to kill any of them, but you have 4 minutes to kill the 2 sergeants. They are located on the bridge in Lumbridge. They are both level 40, but it is multicombat. The sergeants use melee and their max hit is 600. After killing them, the goblins will disappear. Talk to Duke Horacio, and he will give you the reward.

Rewards

 * 3 quest points
 * 500 coins

Trivia

 * On the release date, the spoilers page said: The goblins have taken the rewards. Maybe Mod Andrew can recover them tomorrow.