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TL;DR
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While basic billboards are available to any commander who successfully occupies a sanctuary, Sanctuary NFT holders can freely customize their desired billboard information, unlock various types of rewards for their loyal communities, and most importantly, enjoy exclusive chest rewards every 7 days upon locking their Sanctuary NFTs, REGARDLESS of successful sanctuary occupation.
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By locking the Sanctuary NFT corresponding to a Sanctuary, you will be able to unlock that Sanctuary's NFT Holders' Exclusive Chest Reward and become eligible to claim exclusive rewards.
The Sanctuary Exclusive Chest Reward can be opened once every 7 days. After opening, you must wait until 00:00 on the 7th day before it can be opened again. If you lock NFTs for multiple Sanctuaries, you can claim rewards from each Sanctuary's exclusive chest independently, with no impact on the others' timers.
Note: Across all servers, each Sanctuary NFT yields only one single set of rewards. Each opening grants 4 types of rewards, with probabilities determined by the above probability.
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