Bless Unleashed

This side quest appears super deep into the game. The first step is to finish the entire story (the quests with a blue shield icon). The last one is "To the Timeless Jungle" which ends in the Timeless Jungle, oddly enough. When you go to the quest objective the quest will finish and that's the end of the story quests. It will unlock a bunch of side quests though. The one you care about for this achievement comes from a...frog thing in the Timeless Jungle, she's in the northeast section of the region. She gives 2 quests, one for the area, and one that takes you to Beoran. I did all the other side quests before I got to her, so I'm not sure if you need to do them all.

Anyway, one you have the quest that sends you to Beoran, head to that region (top of the map, far east region). You want to talk to Rene in the northwest section of the region, who should have a side quest for you. I only did one side quest here before talking to her so I assume it is available when you get there. The first one is Ghosts in The Garden.

Ghosts in the Garden - Kill 16 spookies north of her.
A Mysterious Diary - Grab the diary and bring it back to her.
A Fallen Knight - Kill the boss northwest of the diary. He is almost exactly like the "Cursed Knight" arena fight, but obviously much stronger due to him being in a high level area. The arena fight summons 2 big skeletons that chase you and a bunch of smaller ones, but this boss seems to only summon the small ones and they work like the big ones. You get slowed down when they get near. Unless you are geared to the teeth, you won't be able to beat the DPS check, so just run around to dodge the circle. Its regular attack can be dodged by moving left or right during your attack combo (if ranged). Anytime he slams his staff down start moving to avoid it. He also can summon hands out of the ground but these never did much damage to me at all. I was able to solo it, but obviously extra help would be nice.

After this you talk to Rene twice and then you have to head to Ardunn Villlage and talk to someone there, and that will finish the last quest in the chain and give you this achievement.