Kazgar

Kazgar is a cave goblin that replaces Mistag in the tunnel near Lumbridge Castle cellar after completing The Lost Tribe quest.

Kazgar is located right after the hole in the Lumbridge Castle cellar, to the south, before the Lumbridge Swamp Caves.

He can show you the way to Mistag in the Dorgeshuun Mines and to Dartog near the Lumbridge watermill dungeon after completing Death to the Dorgeshuun quest.