This ancient horn was used by the Grail Companion, Duke Fredemund of Aquitaine. When blown, it emits a piercing cry, and the skies become filled with flocks of hunting birds.
During the Command sub-phase of their turn, if they are not engaged in combat, this character may attempt to use the Falcon-horn of Fredemund by making a Leadership test (using their own unmodified Leadership). If this test is passed, until your next Start of Turn sub-phase enemy units cannot use the Fly (X) special rule.