Marvel Premiere #17 Sep 1974
"Citadel on the Edge of Vengeance"
After learning that Harold Meachum has put a bounty on Iron Fist's head, Daniel decides to take the fight to Meachum.
However, this proves to be a challenge as Meachum
having had 10 years to prepare for Iron Fist's arrival
has rigged his office building with a number of traps,
all of which Iron Fist manages to fight through.
The last trap however is deactivated by a mysterious Ninja who briefly helps Iron Fist.
Breaking through a door into the final room of the Meachum building, Iron Fist comes face to face with
a man named Triple-Iron, who has been trapped in that room for 10 years and has vowed to kill Iron Fist.
Script by Doug Moench,
pencils by Larry Hama,
inks by Dick Giordano