In order to protect K'un-Lun and destroy the Hand, the elders of K'un-Lun trained their warriors to choose the best of them. This one is sent to the Cave of the Dragon to face Shou-Lao the Undying, legendary dragon. If the warrior survives, it became "Iron Fist" and gains the power of Chi.
During Danny Rand's time as a student in K'un-Lun, he learned of the position of the Iron Fist, a title of great power and importance throughout the realm. Rand grew ambitious and set out to make himself worthy of gaining the power of the Iron Fist, competing with several other students to reach his goal. Despite many believing that his being an outsider made him incapable of earning the title, Rand's determination grew further.
Many years later, Danny Rand was indeed given the opportunity to gain the power of the Iron Fist. He was sent to battle the enormous fire-breathing serpent called Shou-Lao the Undying which lived in a cave outside K'un-Lun. It ferociously guarded a brazier containing its heart, which had mystically been removed from its body. In their battle, Rand grabbed the serpent's body, which bore a scar that imprinted itself upon Rand's chest. Rand plunged his hands into the now unguarded brazier containing Shou-Lao's molten heart when his hands shone with a quasi-mystical force and he earned the title "Iron Fist," for he could now summon superhuman energy to reinforce the power of blows struck by his hands.
After succeeding in his trial, gaining his powers and the Mark of Shou-Lao onto his chest, Danny Rand was left unconscious outside the cave. He was eventually found by Davos who woke him up. When his friend rushed at him, Rand woke up and summoned his Iron Fist. Astonished, Davos told Rand that he succeeded in his trial.
Afterwards, Rand left K'un-Lun to travel back to New York City and reunite with his friends and company. Rand would later learned that the Hand was located in New York and decides to use his power to fight against them.
- In the comics, Danny Rand fights Shou-Lao roughly a year before he returns to New York. With the date of him travelling being February 2016, a year prior would be roughly March 2015.
- Iron Fist: 1.01: Snow Gives Way
- Iron Fist: 1.06: Immortal Emerges from Cave
- Iron Fist: 1.09: The Mistress of All Agonies
- Iron Fist: 1.11: Lead Horse Back to Stable
- The Defenders: 1.06: Ashes, Ashes
- Iron Fist: 1.04: Eight Diagram Dragon Palm