Final answer:
"Rocket-Propelled Fist" related to Ornn is likely a special ability description referring to the character Ornn in the video game League of Legends.
Step-by-step explanation:
The term "Rocket-Propelled Fist" when related to Ornn is likely referring to a special ability within a video game. Ornn is the character name of a champion in the popular multiplayer online battle arena game League of Legends. In this context, "Rocket-Propelled Fist" is not an officially recognized ability or weapon in the game, and it could possibly be a colloquial or fan-made term to describe one of Ornn's abilities. Ornn's official abilities include the making of items for himself and his teammates, summoning an elemental ram to knock up enemies, and creating a magma pillar to disrupt opponents.