Luffy Haki In Marineford Episode -

Characters like Akainu and Garp noted that this was proof he was truly "his father's son" (Monkey D. Dragon), as Conqueror’s Haki is a rare, hereditary trait shared by some of the world's most influential leaders.

"Conqueror’s Haki. The power to intimidate the weak-willed into unconsciousness." His lava bubbled. "But against magma, will is just gas."

And Luffy—exhausted, bleeding, barely standing—looked up. luffy haki in marineford episode

Doflamingo cackled from atop a debris pile, pink feathers fluttering. "Ooh~! The little monkey has the king’s color! This war just got interesting!"

In the days that follow, the newspapers don’t talk about Whitebeard’s death. They don’t talk about Blackbeard’s betrayal. Characters like Akainu and Garp noted that this

But that moment—that single, unconscious burst of Conqueror’s Haki in the heart of the enemy’s stronghold—becomes the spark that legends are built on.

The burst of willpower knocks out the executioners instantly, along with thousands of surrounding Marines and pirates who have weak spirits. The power to intimidate the weak-willed into unconsciousness

"Gurararara! Did you see that, Sengoku?"