Solasta: Crown of the Magister

Before embarking on the Northern Clans mission, you must find an elf named Heddlon in the general area of the clan headquarters in Valkarokkupun. Just look for an elf with a blue speech bubble (no mission indicator exclamation mark). He will tell you of an artifact in the north, and you must agree to bring it back to him. After the fight with the demon giant, you will get the artifact.

I'd recommend making a save, delivering the artifact back to its owner, the friendly blue giant, for the other achievement, reloading your save, then delivering to the elf second as he is farther away.

It is imperative that you talk to Heddlon before talking to Marduk as you are mostly forced into doing his quest and won't get to talk to Heddlon. I am unaware of whether or not you can talk to him for the first time after getting the artifact but I wouldn't risk it.