Rose King's Shield is a feat available to Avengers and Swordmages who are proficient with the longsword. It is introduced in Dragon Magazine article Channel Divinity: Corellon. [Dr386:66] It gives a +2 feat bonus to Endurance checks. Once per turn when the adventurer with this feat hits with Booming blade or Focused fury with a longsword, the adventurer gains 5 temporary hit points. If the adventurer ended the turn more than 2 squares away from the start of the turn, the adventurer instead gains 10 temporary hit points.