My last spot was…  

Yes.. Tarkan!

Well above is me before I put stuff on.. and below is with my arms..

There are some other mobs like him below.. 

After you completed all three quests, you need to go back to Apostle Devin and give him the items, you will be able to proceed the real quest.

*FYI- It is very hard and time-consuming to actually get all the items that Apostle Devin asks you to bring back. But don’t give up, you will find it eventually if you keep on trying.

TBC...