Matthew was originally Matthew Cable, a long-time supporting character in the Swamp Thing series, but because he died while asleep in the Dreaming, he was offered the chance to become a dream raven and serve Dream if he wished, and he accepted.
Matthew was originally Matthew Cable, a long-time supporting character in the Swamp Thing series, but because he died while asleep in the Dreaming he was offered the chance to become a dream raven and serve Dream if he wished and he accepted