Okay so there's this guy that looks like an acolyte in the Nabreus Deadlands and he's waiting for his 2 loyal disciples. Apparently they hold keys I want :)

Where can I find them?

this side quest takes a fair amount of time and hunts to complete. you need the black fragment(crime and punishment hunt), dull fragment(garamsythe waterway), grimy fragment(talk to roh'kenmou in dalan's), then go to archades find otto in old archades for the moonsilver medallion. then head back to nabreus deadlands and talk ma'kleou again, he tells you to go to Overlooking Eternity, which can be reached by using the secret path in the northwest corner of Slumbermead. you get there and ma'kleou gives you the medallion of bravery, medallion of love, and lusterless medallion. you then go into the necrohol and use the medallions to open up locked rooms which contain bosses. good luck