Blighting Power is a heroic-tier shadar-kai feat available to bards, sorcerers, swordmages, warlocks, or wizards. It was published in Dragon Magazine 372, in article Playing Shadar-kai. [Dr372:9] This feat gives a benefit to one of the associated powers, generally adding the necrotic keyword and making them inflict two damage types. In all cases, the power gains the necrotic keyword.