The Interloper first appeared in Defenders #147 (September 1985), and was created by Peter B. Gillis and Don Perlin.
The character subsequently appeared in Defenders #149 (November 1985), #151-152 (January–February 1986), Strange Tales Vol.
2 #5-7 (August–October 1987), and Doctor Strange: Sorcerer Supreme #3-4 (March–May 1989) The Interloper received an entry in the Official Handbook of the Marvel Universe Deluxe Edition #6.
In the battle, the Interloper tried to hurl his life force against the Dragon; he was transformed into a statue that crumbled into dust.
[1] Due to the intervention of the Vishanti, Interloper's life-force has been merged with the body of Will Fanshawe, a Welsh truck driver; they share possession of this body, which can now transform into an exact duplicate of Interloper's old body, including all of his Eternal powers.