Ssam-Su Secret Technique: Inferno Kick is a technique that combusts high air pressure by grinding the ground. The user can guide the fire created by kicking it towards the enemy.
Trivia
Mangacow use different translations at two different points. When Il-Pyo uses it, it's named Fifth Degree Flame Murder, but when Il-Tae use it, its Five Ways of Fighting: Flame Pillar. LINE translations didn't differentiate between the two.