The artifact System must have an Artifact Holy Goblet. You may purchase one from the shop for 600 gold coins, or 480 if you are a VIP. Or, in a flash sale, 60, or for VIP 48. Once you activate an artifact, it gives you bonus stats for 7 day. In those 7 days, if you can upgrade it to level 2, the stats are permanent and the artifact stays. To upgrade, you must have Magic Lunas, and Sun Stones. You must enchant your artifact and once you've enchanted it to the maximum, you may upgrade it with the Sun Stones.