The sapphire demon statuette is a demon statuette found on a plinth near the corpse archer in the Lumbridge Catacombs. The statue appears after you complete The Blood Pact quest in the catacombs. You can enter the catacombs once to complete the quest, and multiple times after to battle the spirits that Reese will release. When you go to take the statue, a level 13 corpse archer will attack, but you do not need to kill it to take the statue. Currently the only use for it is to sell it to Xenia for 300 coins. If you do choose to sell it to Xenia, you will not be able to get it back from the Lumbridge Catacombs.