Tags: Comics Character.
Amadeus Cho also known as Mastermind Excello is a fictional comic book character appearing in books published by Marvel Comics. Created by writer Greg Pak and artist Takeshi Miyazawa the character first appeared in Amazing Fantasy vol. 2 #15 (January 2006). He usually appears as a supporting character in books featuring The Avengers or individual members of that group such as Hulk or Hercules.