Raksha, the Shadow Colossus (miniquest) - RuneScape Wiki
Walkthrough. Start the miniquest by talking to Laniakea at the south-east ruins of Anachronia and asking about the doorway at the top of the ruins. Go west, up the stairs, and siphon the shadow anima pools five times, until you reach 100%. You will take 200 life points of damage each time, and you cannot siphon the same pool consecutively.
DA: 74 PA: 45 MOZ Rank: 7