There is an error on the Special FINAL FANTASY XI Eleventh Anniversary Campaign page.
On the
11.) Seals battlefield event—additional items dropped
it lists
Bia Orb
(50 High
Kindred's Crests)
Monarch Linn Spatial Displacement All Levels
15 minutes
6 person party Gullinkambi
The name of the fight is not Spatial Displacement, it is Nest of Nightmares.