Guild Wars 2 Sneakthief Mask of the Centaur Item

Superior Rune of the Centaur
(1): +25 Power
(2): +10% Swiftness Duration
(3): +50 Power
(4): -50% Incoming Cripple Duration
(5): +100 Power
(6): +20% swiftness duration; when you use a heal skill, you and all nearby allies gain swiftness for 10 seconds. (Cooldown: 10s)