Heirlooms are distributed one to each character during character creation to give them a unique edge and to make them different if you make another of the Same character up at another time.
Artefacts are used in Certain stories as rewards for killing or uncovering things.
Thanks for the quick reply! Sorry, I didn't realize that there where artifacts in the basegame as well, makes sense.
Sounds good with heirlooms, but where is the rule for this? Can't find it in the core game..