From 1984 to 1988, Spider-Man wore a black costume with a white spider design on his chest. The new costume originated in the Secret Wars limited series, on an alien planet where Spider-Man participates in a battle between Earth's major superheroes and villains. He continues wearing the costume when he returns, starting in The Amazing Spider-Man #252. The change to a longstanding character's design met with controversy, "with many hardcore comics fans decrying it as tantamount to sacrilege. Spider-Man's traditional red and blue costume was iconic, they argued, on par with those of his D.C. rivals Superman and Batman." The creators then revealed the costume was an alien symbiote which Spider-Man is able to reject after a difficult struggle, though the symbiote returns several times as Venom for revenge.
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.