The artifact slot is not unlocked via a specific mission It

Artifact Borderlands Wiki bl3 unlock artifact slot The artifact slot is supposed to unlock after you go into the Vault on eden six It's the technology you gain inside, just like you get the treasures of troy slot Artifact slot unlocks on the mission before Angel's and Speed Demons Somewhere beyond right and wrong, there is a garden I will meet you

magic book slot To unlock the artifact slot, you need to complete Cold as the Grave main quest on the planet Eden-6 As a reminder, the main part of this quest