The Malcious Chest is a limited edition Chance Chest that was released on July 9th, 2015 and ended on July 16th, 2015. The new Dragonforged released in the chest is the Malicious Ragemail, which is a Fire/Water Dragonforged Armor
There is an increased chance of receiving a Dragonforged.
1 Chest: 25 Gems
11 Chests: 250 Gems
24 Chests: 500 Gems
52 Chests: 1000 Gems