Scale of Venril from Jail and Torture Chamber: ( 36, -132, 215 ) Copy/waypoint 36.35, -131.75, 214.66
Drop into the water near the zone entrance and swim to the underwater spout at ( -44, -53, 141 ) Copy/waypoint -44.02, -52.50, 140.92. Once inside Ruins of Old Sebilis, drop down into the rectangular pool and keep swimming until the waypoint wisp activates. The item looks like a regular shiny.
Go to the Laboratory and Study ( -260, -23, 337 ) Copy/waypoint -259.59, -22.75, 337.38 and click a small candle-like object on a table, at ( -308, -21, 325 ) Copy/waypoint -307.55, -21.00, 324.58. This will open the hidden door.
2 karyotic algaes from the water beneath the Mezzanine: ( 66, -96, 140 ) Copy/waypoint 65.79, -96.00, 139.85