To begin the Goblin Diplomacy quest in RuneScape: Dragonwilds, you need to pick up the Bandosian Amulet from a goblin camp in the middle of a lake southeast from Bramblemead Valley. Defeat the goblins in that camp and head down the stairs. Your path will be blocked by thorny vines on the right, so you'll need to chop them down to get ahold of the Reliquary...
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How to complete the Goblin Diplomacy quest in RuneScape Dragonwilds
Source: PC Gamer (opens in a new tab)