Fenris is a dual Earth/Fire Element Epic Boss that runs from October 16th through to October 23rd. It drops Blazing Tufts when defeated which are used to craft the Armor of the Wolf when you have 50 pieces.
Armor of the Wolf is the 1st of 3 armors in the Night Watcher Boss Collection.
Level 1 - 7 Blazing Tufts, 5,000 Gold and 5 Epic Energy
Level 3 - 4 Stonescale Plate Mails and 3 Silver Keys
Level 6 - 12 Blazing Tufts, 5 Epic Energy and 4 Stonescale Plate Mails
Level 10 - 7,500 Gold and 3 Chimera Corps Uniforms
Level 15 - 15 Blazing Tufts (You can now craft the Armor of the Wolf)
Level 21 - 10 Stonescale Plate Mails, 1 Fusion Stone and 1 Gem
Level 28 - 15,000 Gold, 10 Epic Energy and 3 Enchanted Keys
Level 35 - 10 Chimera Corps Uniform and 3 Gems
Level 43 - 30,000 Gold and 5 Enchanted Keys (You will now have enough materials to craft this armor again)
(You will be able to craft the plus version after leveling the original armor to Level 35)
Level 51 - 15 Chimera Corps Uniforms and 3 Fusion Stones
Level 60 - 10 Enchanted Keys, 5 Dark Prince Keys and 5 Gems