CLASSIFIED DOCUMENT 8t5afr-GRIDLOCK. Incident 042: The Kyrexi Anomaly. Between 02:47 and 03:04 on February 27, 1987, the Azure Citadel's east wing underwent a spatial fissure, generating 473 echo-chambers. Cartographers logged impossible stairwells and inverted courtyards. Witnesses reported spectral silhouettes conjuring luminescent orbs. The fissure self-repaired, leaving behind only cryptic murals and a lone, shattered astrolabe. Analysis suggests an intrusion by a "folded" entity, which manipulated the citadel's morphology to create transient, labyrinthine pathways. The astrolabe's shards have been quarantined, as they continue to emit a low-frequency, reality-distorting hum. Further investigation is suspended pending clearance from Level 7 Overwatch.