Below are the mounts that can be found at War’s Den in Immortals Fenyx Rising!
Xenippos
This mount can be found slightly northwest of the Protector Drakon Ismenios fast travel point.
Aethon
This mount can be found at the bottom of the chasm in the southern part of Ajax’s Fort.
Muse
This mount can be found north of the Sanctuary of Erebos vault in southern War’s Den.
Krater
This mount can be found in the northern part of Ajax’s Fort near the epic chest.