Aden Vanguard Captain Adolph:
Good. Left me explain the details. Go to the Garden of Spirits, defeat the Kerberos Lager, Kerberos Fort, Kerberos Nero, Fury Sylph Barrena, Fury Sylph Labido, Fury Sylph Purka, Fury Kerberos Leger, and Fury Kerberos Nero, and put them to rest.
As evidence, please bring back 200 Mutated Spirit's Souls. It should be manageable.