We will start this quest assuming you are in the Garden of Dalja. If you have no idea how to get there, then this guide should help you.
Make sure your character is saved, then head west and jump off of the Garden. You should land here:
Dalja Garden Jump-Off Point.
Head north-east to the Redeemed Village. (North-West corner of Adonis, near The Outmost Yard statue on the map) At this village, you need to get your hands on a Note. Two mobs are known to drop this - Sipius Gil Ilad-Ilad and Watcher Gil Hume-Wei.
we can get started on the running about part of this questline!
Head back to the garden and use the Lament Lagoon statue exit. You need to trvel to the Unredeemed Temple to talk to Prophet Man Dal.
Unredeemed Temple in Adonis Abyss
The temple is located south-southeast from the Lament Lagoon statue exit in the southern most part of the Abyss.
Unredeemed Temple Entrance.
Prophet Man Dal
As soon as you are in the temple, head to the second room. In this room, take a left as soon as you are inside the room. Zone through the door and in the circular room, go left until you find the Prophet.
Prophet Man Dal.
Talk to him and get the quest to get the Note. As we already have the Note, chat with him again and trade the Note with him. This should update your mission to the next stage.
Redeemed Ark Artifacts
The Prophet wants you to go and find Redeemed Ark artifacts. He will give you an Insignia of Dalja as well as handing you back the Note.
The first ark.
Once back in Dalja Garden, head North-West and jump off. Head towards The Outmost Yard statue (Redeemed). Run past it and to the edge, then go for a swim. Get out of the water at the desert to the north and run north-east across the sandy hills. Head near to The Dead Ends (Clan Sanctuary statue). Once on the rocky crags be careful, it's easy to fall and then you'll end up on Rubi-Ka.
Head north and around to the first location of an Ancient Control Panel.
The first ark.
Target it and your mission should update. One down, one to go.
The second ark.
Back to the Garden. (If your like me you can just train to the Ark, select it then die from the train) From the Garden us the City North exit. Head West across the walkway and then all the way to the gorge. Look to the far side of the gap to what looks like a pile of dirt on the far side. Be sure to jump into the water on the right side of the pile or you'll end up in RK. Swim to the far side then West and down a waterfall onto land.
Double back and head North (with some westward) on the other side up to the white (snow) area. Some nice castles to look at here, though I doubt people going for the key much care to sight see. Right where it starts there is a little bridge (not shown on the map) with Dryads on the other side. I advise to avoid them and instead swim north and around. Almost reaching Piercing Tundra sanctuary exit. (Be wary of monsters in the water; I came across one Dryad there and died because it could attack but I couldn't. A truly sad oversight by the developers but we can do nothing but try again.)
The second and last Ark is located near the peak of the island with Coral Raft exits on it. Left side, north peak.
And again, near lots of black ruins. Select it and you'll get a mission update. Head back to the garden (best to just do /terminate this time, so far to run)
Visionist Bhotaar-Hes Dal can be found just south-west of the center. Talk to him and give him the Note that you kept. He will reward you with: