Mardi Gras Chest is a limited edition chest that runs from the 14th of February to the 4th of March 2014.
To open one chest it costs 30 Gems, when you open 11 at once for 300 Gems you will get 5x Water Fusion Boost Armor and when you open 40 at once for 999 Gems you will get 20x Water Fusion Boost Armor and a Slimebane Battlegear +.
The new epic armor introduced in this chest is Aquatic Battlegear
The Second Mardi Grah Chest is a limited edition Chance Chest that was released on February 27th, 2015 and ended on March 2nd, 2015. There was no new Epic released in this chest
There is an 8x chance to get an Epic or Legendary armor.
1 Chest: 35 Gems
11 Chests: 350 Gems
24 Chests: 700 Gems
52 Chests: 1400 Gems
11 Chests: 5 Earth Fusion Boost Armors