Chamber of DerivationLocations›Hidden Mountain›Heaven's Threshold›Chamber of DerivationBoundary Stone · 8 compendium entries in 3 categoriesTools 1Frame SawPickup on the table in the south-west of the disk directly south of the Chamber of Derivation boundary stoneSpecial Records 6Family LetterPick it up from a wooden box high up on the northeast side of Chamber of Derivation boundary stoneCrane's JournalPick it up from a rock next to the Chamber of Derivation boundary stone (rock seems to not always be there, possibly only if the record has been added and not collected…Halcyon's Journal IIPick it up from a table at the southwest edge of the circular platform south of the Chamber of Derivation boundary stoneHalcyon's Journal IIIAfter completing the boss, open the door and pick it up inside the room at the northwest of the large circular platform south of Chamber of DerivationMohist Hill Annals - Fool's SpecialtyPick it up inside the room on the west side of the circular platform south of Chamber of DerivationThree Swords of the HavenAfter completing the boss, open the door and steal it from Xin Yuan inside the room at the northwest of the circular platform south of Chamber of DerivationErudition 1Suspended FireCollectible on lantern in monkey cave (at Chamber of Derivation boundary stone)More places in Heaven's ThresholdDriftseed Moor 15Hangrock Hamlet 8Soughing Knoll 5Ascendant Peak 5Goldflow Slope 5Mirkvale 4Hundredfold Forge 4Unitide Terrace 4Welkin Way 3Stellabed Rocks 3Brookwood Gorge 3