Fan Fei was born and raised in the heavenly city, K'un-Lun. At the age of 15, she was caught teaching kung fu to the cavemen beyond K'un-Lun's borders. To punish Fei, her students were fed to Shou Lao. Angry, she jumped in the dragon's pit so she could punch Shou Lao once before dying, however, she managed to slay the dragon and win the power of the Iron Fist. For killing their sacred dragon, Fei was exiled from her home.
Fan Fei 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 with Marvel's oldest heroic mantles.
Major Story Arcs
As she traveled the outside world, she defended the weak humans from the Man-Apes, but vowed never to train them again. This got the attention of Mephisto, who visited her in the form of a snake. When she refused his partnership, Mephisto offered his help to the Alpha Gorilla instead, gifting him the Power Gem to even the odds against Fei.
Fei was injured badly in her fight with the Alpha Gorilla. So much so, she wandered back to K'un-Lun where she was welcomed back with open arms. Shou Lao was resurrected, and her actions had revealed his true nature to her people. She refused and continued traveling the world defending the weak.
Avengers 1,000,000 BC
Fei was approached by Firehair for her team of champions to defend the mortals of Earth against a Celestial, named Zgreb, who was simply looking for a Celestial that landed on Earth before any of these Avengers were even born.
She would stay with the team for many battles including ones against: the first Moon Knight, a young Thanos, and an army combined of Frost Giants and Negative Zone insects. They would disband after Black Panther's death at the hands of the Frost Giants, only to reunite when the son of Odin, Thor, was being born.
Mutant Intellect: Fei seemingly had an intelligence that was relatively larger than most of her species. She was seemingly able to communicate with the nonverbal Starband on her team.
Chi Manipulation: Having dipped her hands into the hear of Shoa-Lou, Fei is able to channel her chi into a single point on her body, usually her fists. This increases their strength and durability and causes them to glow with yellow energy. With focus, she should also be able to channel her chi to injuries, allowing them to heal faster than usual.