The Anniversary Chest was a limited time treasure chest offered in Castle Age, available exclusively during the 10th Anniversary Festival. It cost 30 FP for one item pull from the chest and 80 FP for 3 pulls. It was available for players of all levels.
It was introduced on September 16, 2019 with a limited time of 168 hours (1 week) to use it.
As the limited Nightmare Chest, it included a "Legendary" section. You had a 1% chance to pull a "Legendary" reward.
As it was introduced as part of an anniversary celebration, this chest had increased odds for Epic, Rare and Uncommon tiers.
Chest contents & Items rarity
1% chance to pull an item from this tier. Composed exclusively of heroes (otherwise found in the Legendary Chest).
This chest didn't include any new item or hero. All players could vote for their favorite heroes to be featured in this Chest through a poll opened on August 6, 2019.
However, the way the Anniversary Chest was put together wasn't transparent at all. There was no result announced from the vote. Many generals in the chest are very unlikely to have gathered enough votes to be chosen, especially those of the Uncommon tier. Furthermore, putting Favor Generals in the Chest, especially Muse which wasn't even discontinued, was a questionable decision.
The Common tier was composed of the same very low value items as the Nightmare Chest's Common tier.