Question: Dreamslayer is a homage to a character created by whom?

full_context: Document 1: Dormammu: Dormammu ( ) is a fictional character appearing in American comic books published by Marvel Comics. The character first appeared in "Strange Tales" #126 (November 1964), and was created by Stan Lee and Steve Ditko.
Document 2: Flag-Smasher: The Flag-Smasher is the name used by two fictional supervillains appearing in American comic books published by Marvel Comics. The original was most often a foe of Captain America while other adversaries of the Flag-Smasher include The Punisher, Moon Knight, Ghost Rider, The Runaways, The Liberteens and Deadpool.
Document 3: Umar (Marvel Comics): Umar ( } is a fictional character appearing in American comic books published by Marvel Comics. The character resides in the "Dark Dimension" of the Marvel Comics multiverse. She is a Faltine, a higher-dimensional energy being, but is trapped in human form. Although she is a sorceress and has vast magical powers, she is still second to her brother Dormammu. Umar is commonly a foe of Doctor Strange as well as the mother of his wife, Clea.
Document 4: Clea: Clea ( ) is a fictional character, a sorceress appearing in American comic books published by Marvel Comics. She is the disciple and lover of Doctor Strange. Created by co-plotters Stan Lee and Steve Ditko, Clea first appeared in the Doctor Strange feature in "Strange Tales" #126 (November 1964).
Document 5: Doomsday (comics): Doomsday is a fictional supervillain appearing in American comic books published by DC Comics, commonly in association with Superman. Created by writer-artist Dan Jurgens, the character had a cameo appearance in "" #17 (November 1992) and made his first full appearance in "Superman: The Man of Steel" #18 (December 1992). Doomsday is an adversary to Superman, as well as the Justice League.
Document 6: Lord Havok: Lord Havok is a fictional character, a DC Comics supervillain, part of the supervillain team called the Extremists. He is a genius equipped with a powered armor. Lord Havok first appeared in "Justice League Europe" #15 (June 1990). He is a nod to the Marvel comics supervillain, Doctor Doom.
Document 7: Doctor Doom: Doctor Victor Von Doom (or simply Doctor Doom) is a fictional supervillain appearing in American comic books published by Marvel Comics. The son of Romani witch Cynthia Von Doom, Doctor Doom traditionally has been the archenemy of the Fantastic Four, and the leader of the fictional nation of Latveria. He is both a genius inventor and a sorcerer. While his chief opponents have been the Fantastic Four, he has also come into conflict with Iron Man, Spider-Man, Black Panther, the Avengers and multiple others. Doom has been depicted as a superhero, taking up the mantle of Iron Man from Tony Stark, and going on to join the Avengers.
Document 8: Crime Syndicate of America: The Crime Syndicate are teams of fictional supervillains from one of DC Comics' parallel universes, who are the evil counterparts of the Justice League of America. The original team was specifically known as Crime Syndicate of America and is sometimes abbreviated as CSA. This first superpowered Crime Syndicate team appeared in "Justice League of America" (vol. 1) #29 in August 1964. The primary successive incarnation, known as the Crime Syndicate of Amerika (with the variant spelling of America), first appeared in the 2000 "" graphic novel.
Document 9: Dr. Doom (disambiguation): Doctor Doom (real name Doctor Victor von Doom, or Dr. Doom for short) is a Marvel comic book supervillain. The name may also refer to:
Document 10: Brother Voodoo: Brother Voodoo (Jericho Drumm) is a fictional character, a supernatural superhero appearing in American comic books published by Marvel Comics. He first appeared in "Strange Tales" #169 (Sept. 1973). The character was created by writer Len Wein and artist Gene Colan. Since replacing Doctor Strange as Sorcerer Supreme in "The New Avengers" #53 (July 2009), the character is referred to as Doctor Voodoo.
Document 11: Dreamslayer: Dreamslayer is a fictional character, a DC Comics supervillain, and part of the evil gang called Extremists. Like the other Extremists, he is a homage to a Marvel Comics character, in this case Dormammu. He first appeared in "Justice League Europe" #15 (June 1990), and was created by Keith Giffen, Gerard Jones and Bart Sears.
Document 12: Doctor Strange: Doctor Stephen Vincent Strange, M.D., is a fictional superhero appearing in American comic books published by Marvel Comics. Created by artist Steve Ditko and writer Stan Lee, the character first appeared in "Strange Tales" #110 (cover-dated July 1963). Doctor Strange serves as the Sorcerer Supreme, the primary protector of Earth against magical and mystical threats. Inspired by stories of black magic and "Chandu the Magician", Strange was created during the Silver Age of Comic Books to bring a different kind of character and themes of mysticism to Marvel Comics.
Document 13: Dark Circle: The Dark Circle is a fictional criminal organization in that appears in comic books from DC Comics, primarily part of the Legion of Super-Heroes comic books. They first appeared in 1968, created by Jim Shooter as a criminal organization founded by five members and populated by a multitude of clones of the original five members.
Document 14: Dream (comics): Dream is a fictional character appearing in American comic books published by DC Comics' imprint Vertigo. The character is the protagonist of the comic book series "The Sandman", written by Neil Gaiman. One of the seven Endless, inconceivably powerful beings older and greater than gods, Dream is both lord and personification of all dreams and stories, all that is not in reality (which, in turn, Dream may define by his existence). He has taken many names, including Morpheus and Oneiros, and his appearance can change depending on the person who is seeing him. Dream was named the sixth-greatest comic book character by "Empire Magazine". He was also named fifteenth in IGN's 100 Top Comic Book Heroes list.
Document 15: Doom 2099: Doom 2099 (Victor Von Doom) is a fictional anti-hero appearing in American comic books published by Marvel Comics. The character was primarily featured in the Marvel 2099 series "Doom 2099". The character is based on Doctor Doom, created by Stan Lee and Jack Kirby. The series was written by John Francis Moore for its first two years, and by Warren Ellis for its third.
ground_truth: Stan Lee and Steve Ditko