If you thought you knew the beginnings of the Marvel Universe, you were wrong! Odin and his Prehistoric Avengers represent a period of history that's never been explored -until now! Witness the origin of the very first Ghost Rider, who rides a flaming woolly mammoth...and battles a savage and familiar foe! Back in the present, in the aftermath of their world-shaking battle against the Dark Celestials, the new Avengers team is officially formed -complete with a startling new headquarters at the top of the world! Behold the wonders of Avengers Mountain. But someone who doesn't seem impressed is Namor, the ferocious lord of Atlantis -and his rage may turn the oceans red with blood!