The Whirlpool Chest is a limited edition Chance Chest that was released on January 21st, 2015 and ended on January 26th, 2015. The new Epic released in the chest is the Poseidon's Vestments which is a Mono Water Epic Armor.
1 Chest: 35 Gems
11 Chests: 350 Gems
24 Chests: 700 Gems
52 Chests: 1400 Gems
11 Chests: 5 Water Fusion Boost Armors