Secret Avengers #1 Skottie Young

Secret Avengers #1 (2010) introduces Steve Rogers' black-ops team, featuring Black Widow, Valkyrie, Moon Knight, Ant-Man, Beast, War Machine, and Nova. Their debut mission involves recovering a mysterious "Crown of Tentacles" from Roxxon. This leads Nova to Roxxon's Martian mining base, where he encounters the powerful Serpent Crown. Notable for the first appearance of the Secret Avengers and the enigmatic Shadow Council, this issue kicks off Marvel's 'Heroic Age'.