Yuling Dao Sect was a Sect that specialized in taming various Demonic Beasts to assist in combat.
Within the Sect, there was a spirit manual created by the founding master of the Sect.
Empowered by this spirit manual, Yuling Dao Sect quickly rose to prominence in the Western Demon Region and became one of the top Sects there.
That was why they were so interested in Little Sparrow.
The reason was that Little Sparrow was one of those rare Demonic Beasts with awakened spiritual intelligence.
A beast with awakened intelligence could no longer be called a Demonic Beast; it was known as a Spirit Beast.
Such Spirit Beasts were in perfect harmony with the spirit manual, a priority for the Yuling Dao Sect, and could even be cultivated as personal life-bound Spirit Beasts.
If one could form a life-bound contract with such a beast, not only could it greatly increase one's strength, but it would also be immensely beneficial for one's cultivation.