Iron Fist #73 p.03 - Choshin Kills The Bull!

Upon taking possession of the item The Long Armed Bull acquired for him, Choshin immediately attacks him with a throat strike and follows that up with a killing blow, revealing to The Long Armed Bull as he's dying, that it is punishment for falling so quickly in combat against Iron Fist during The Trial of the Seven Masters, told in Iron Fist #1-5.