Prydwen can be obtained by having Mordred (Rider) reach Bond Level 10.
Prydwen is an exclusive CE to Mordred (Rider).
Rashoumon event (Ibaraki Douji event)
Murder at the Kogetsukan
Inheritance of Glory
Evil Bone
Orion
Ishtar (Archer)
Osakabehime
Jewel Cut Stars
Ereshkigal
Arthur Pendragon(Prototype)
Gorgon
Black Holy Grail (The Black Grail)