Unearthed

Prerequisite: Complete “Helping Havarl’s Scientists”

Upon reaching the top of Mithrava during long side quest “A Dying Planet”, you can talk to Sage Fleera to learn more about the buried artifacts in the planet. This will unlock the task of collecting at least eight unearthed Remnant devices.

These remnant devices are not marked in the map but you can find more than eight of them scattered in the surface of Havarl. They appear as pale-colored, glowing, tangled branches with electricity emanating from them. Take note of the radar bleeps that will trigger if you’re near them as well. I managed to compile the locations of enough remnant devices to complete the task in the video below.