The Quagmire Chest is a limited edition Chance Chest that was released on February 5th, 2015 and ended on February 9th, 2015. The new Epic released in the chest is the Brightwind Platemail which is a Mono Air Epic Armor.
1 Chest: 35 Gems
11 Chests: 350 Gems
24 Chests: 700 Gems
52 Chests: 1400 Gems
11 Chests: 5 Earth Fusion Boost Armors