This item is currently not available in the Guild Wars 2 API and you are seeing the last known version. The item has either been removed from the game or needs to be rediscovered.
Gain a charge when you kill a foe, five if you kill an enemy player. At 25 charges, gain quickness for 5 seconds. (You lose all stacks on down.)
"description": "Gain a charge when you kill a foe, five if you kill an enemy player. At 25 charges, gain quickness for 5 seconds. <c=@reminder>(You lose all stacks on down.)</c>"