Etched with detailed motifs of one’s ancestors, the Shield of the Fallen activates when its user is in grave peril. If below half health, the user gains an additional +1 to AC and can force a re-roll of a melee attack against them once every 1d4 rounds.
Image Source: Viking Shield Vallkyrie by ZawArt on DeviantArt.
https://bit.ly/2BjktZZ