Lumbridge Catacombs

The  is a dungeon that’s designed for low-level characters, which features new monsters to fight, each of which drops parts of a new costume set.

You must have completed The Blood Pact to be able to access this dungeon.

Monsters
Warped Cockroach (Level 1)

Corpse spider (Level 3)

Warped fly (Level 5)

Crawling corpse torso (Level 7)

Warped rat (Level 9)

Skeleton (Level 11)

Warped bat (Level 12)

Corpse archer (Level 13)

Skoblin (Level 14)

Corpse mage (Level 15)

Dragith Nurn (Level 20)

Mask of Dragith Nurn
Mask Part 5 is always dropped by Dragith Nurn which appears upon touching the Diamond Demon Statuette. The other 4 are obtained from other monster. The first one to drop a part is the Warped Cockroach, followed by the Crawling corpse torso, Warped bat and the Skoblin. Assemble the mask by using any one of the parts with another while all 5 parts are in your inventory.

Demon Statuettes
There are six jewel statuettes scattered throughout the dungeons on plinths. In ascending order of gem value from the entrance, the statues are made of jade, topaz, sapphire, emerald, ruby and diamond. They can be given to Xenia in exchange for gold rewards: 100 for jade, 200 for topaz, 300 for sapphire, 400 for emerald, 500 for ruby, 1000 for diamond.

Trivia

 * All monsters in this dungeon drop the same items but in different quantities.