After training with for two years, Luffy returns to Sabaody with full control over his Haki.
However, a more notable instance is during the Marineford Arc (Episode 389) when Luffy confronts Akainu. which episode luffy use supreme haki
The air crackled with energy. The real fight had just begun. After training with for two years, Luffy returns
In this episode, Luffy's Supreme Haki clashes with Katakuri's, creating an intense and visually stunning scene. This marked a significant moment in the series, as Luffy's growth and mastery of his Haki abilities became apparent. The real fight had just begun
Kaido, the Emperor of the Sea, floated in his dragon form above the crumbling skull of the island, his bellowing roar shaking the very bones of the earth. Below, the samurai alliance was faltering. Hope was fraying like an old rope in a storm.
Luffy does not achieve the latter until the .