Riddle of White Fields

Who/What am I? As the Wolfpack dream comes to an end and the darkness settle in, the three of the pack are separated. For these are my beacons. One who lies in the shadows or gunning with cunningness. The other two bond and find a way to stay upon the wall. They are at each other's backs watching the field of white while making the white field grow. As one falls the other calls and returns his brother back to the fray. As the strength of the pack is the wolf, the strength of the wolf is the pack. Have fun with this Riddle Don't guess Gjallahorn because it's not it. Hint#1 : focus on the wolves Hint#2 : Warlocks aren't a part of the riddle Winner!!!: is Eat Mor Chikin6 with the answer of Alpha Lupi. Everyone guessed around him or have multiple answers with the armor. Look out for my next riddle tongiht