This has been going on for at least a month now, I think, and I have moved to several regions. My advie is on Dwilight too, if that makes a difference.
You investigate the monster situation in Masatodon. There can be no doubt that there are monsters here, aside from the many reports you can see signs of their presence yourself.
Then you turn to look for undead. You hear rumours about undead and a few who claim to have seen them from afar.
I spent 7 hours hunting monsters, my first and third attempts found them but none of the others were successful. Sometimes I only find one group, or none at all. Even when I use as many hours as I can before my advie tires out.