Shadow Demons (DC)

From Multiversal Omnipedia

The shadow demons were the servants of the Anti-Monitor, created from the most evil of his Thunderers. They resembled the silhouette of the Monitor, were invulnerable to most standard attacks (sonic, magnetic, gravitic, and magical attacks are the few exceptions), and could disintegrate anything they touched. After the Anti-Monitor's defeat, all the Shadow Demons ceased to exist.