Goff’s Loot Halloween Achievement

Goff’s Loot Explorer Achievement takes place in North part of Kessex Hills, North of Earthlord’s Gap. Mobs in this area don’t do high damage, but there are two Veteran Cave mobs guarding the chest.
The door that leads to Splendid Chest and Achievement is locked and you have to interact with the door and defeat two Veteran Cave Trolls after that.