There are 6 Artifact Sanctuaries - Blade Sanctuary, Chalice Sanctuary, Staff Sanctuary, Aegis Sanctuary, Diadem Sanctuary and Scripture Sanctuary.
Conquering and controlling an Artifact Sanctuary grants the Alliance Leader ownership of that Artifact.
[Artifact Sanctuary Battle]
Artifact Sanctuaries become invulnerable when the Capital War ends.
Attacking and Dominating is possible once the invulnerability of the Artifact Sanctuaries expires. Each Alliance can only control one Artifact Sanctuary at a time.
[Artifact Sanctuary Control]
Normally, you take over an Artifact Sanctuary after controlling it for 30 minutes.
During Capital War, you take ownership of a Sanctuary after controlling it for 5 minutes.
[Artifact Sanctuary Control Reward]
When you control an Artifact Sanctuary, you obtain Gold rewards every 6 hours. 50% of the obtained Gold will be sent to the Alliance Leader and the other 50% will be sent to the Alliance Vault. You can't receive the control reward during Capital War.
However, when changing Capital War control, the Alliance that's either conquering or controlling the Sanctuary will be provided a reward in the Artifact Sanctuary Vault, and the Alliance Leader will be able to bestow rewards to the Alliance Members.
[Artifact Sanctuary Buff Bonus]
The Alliance controlling an Artifact Sanctuary receives economy buffs based on the Sanctuary.
Losing control of an Artifact Sanctuary eliminates the buff bonus from that Sanctuary.
Controlling the Artifact Sanctuary during the Capital War period will change the buff to a Troop Attack Increase Buff Bonus, and when a Friendly Alliance controls the Sanctuary, the same buffs and stats will stack based on the number of controlled Sanctuaries.
[Artifact Sanctuary Protection]
All Sanctuaries become invulnerable for 12 hours once the Capital War ends.
[Artifact Sanctuary Battle]
An Artifact Sanctuary Battle that's not within the Capital War period opens every 18 hours. During the reward period, all Alliance Members who deployed troops to the Sanctuary that was being conquered or controlled will receive rewards.