void main()
{
object oSelf = OBJECT_SELF;

//0 - 54 (as 55 is not counted)
int nDice = Random(55);

//note you must have an artifact with the resref artifact0

string sName = "artifact" + IntToString(nDice);

//Put one of the above artifacts in the Unique Chest..
CreateItemOnObject(sName, oSelf, 1);

}