Overgrown Chest is a limited edition Chance Chest, that was released on December 17, 2015, and ends December 24, 2015.
The rarities ranged from Ultra Rare to Dragonforged.
The armor featured was the Ancient Frondmail+, which is part of the "Ancient Taxa" set, and has a dragonforged rarity.
Cost:[]
1 Chest: 25 Gems
20 Chests: 250 Gems
50 Chests: 625 Gems
100 Chests: 1250 Gems