The true identity of this Captain Universe was never revealed but the host had more than likely had the Uni-Power for several years. During the battle that ensued between the Law Enforcement Squad and the Fantastic Four; Captain Universe and Dr. Druid ganged up on Reed Richards in order to destabilize the Fantastic Four's cohesion as a team. With only seconds to spare, Reed convinces Captain Universe that something is out of place and that the Fantastic Four are not his enemies. Captain Universe reveals to Druid that Reed is telling the truth, but before he can convince the others to stop fighting, he is struck down by Nova.
The practice may have originated in a Celtic festival, held on 31 October–1 November, to mark the beginning of winter. It was called Samhain in Ireland, Scotland and the Isle of Man, and Calan Gaeaf in Wales, Cornwall and Brittany. The festival is believed to have pre-Christian roots. After the Christianization of Ireland in the 5th century, some of these customs may have been retained in the Christian observance of All Hallows' Eve in that region—which continued to be called Samhain/Calan Gaeaf—blending the traditions of their ancestors with Christian ones. It was seen as a liminal time, when the spirits or fairies (the Aos Sí), and the souls of the dead, could more easily come into our world. It was believed that the Aos Sí needed to be propitiated to ensure that the people and their livestock survived the winter.