Into the Fray - AOE Buff - increases party Run Speed, Action Point generation and grants them a percentage of your Max HPs as temporary HPs. Points increase the magnitude of the Run Speed buff.
If the level of the items in the box is determined by the level the player was when it was looted, it'd be interesting to know if that carries over when the box is sold on the auction house. Imagine buying a box looted by someone at level 21 when you're level 50 and getting a useless, lowbie item.