As a boy, this Ghost Rider was a member of a tribe that didn't dare leave their cave and face the snowy weather. One day, a stranger with a Wendigo curse came to their cave. He quickly asserted himself as the leader of the tribe and then systematically killed all of them but this boy. This Wendigo had the same intellect gene, so he took pity on the boy and dubbed him Ghost for surviving.
Ghost ventured into the snow to claim his vengeance. Instead, he found Mephisto, who offered him the power to take on the Wendigo. Mephisto turned the boy into the first Spirit of Vengeance, and he rode atop a mighty Mammoth. He kills the Wendigo and gets the attention of Firehair, who invites him to her Avengers.
Ghost first appeared in Marvel Legacy #1 as a member of the Avengers 1,000,000 BC, a major player in Jason Aaron's Avengers plans for Marvel's oldest heroic mantles.