Guild Wars 2 Magi's Rubicon Hat of Infiltration Item

Superior Rune of Infiltration
(1): +2% damage against foes with less than 50% health.
(2): +35 Precision
(3): +4% damage against foes with less than 50% health.
(4): +65 Precision
(5): +6% damage against targets with less than 50% health.
(6): When struck below 20% health, cloak for 4 seconds. (Cooldown: 60s)