Sailing: His comprehension is against the sky, and he comprehends the Eight Gates at the beginning.

He traveled through the world of pirates, replaced the unborn Luffy, and gained a natural talent for comprehension.
Since then, Luffy has created all kinds of incredible abilities.
"Your comprehension is extraordinary. Through visualization and understanding, you have mastered the unique skill - Eight Gates of Ninjutsu."
"Your comprehension is extraordinary. Through visualization and understanding, you have realized - Domineering Haki - Entanglement."
"Your comprehension is extraordinary. Through personal visualization and understanding of transmission, your transmitter has mastered a unique skill - the Transformation of Buddhahood."
"You have an incredible comprehension ability. Through meditation, you have mastered a special combined skill - Gear Five - Nika Yekai."
......
In the Battle of Marineford, Luffy led the new Straw Hat Pirates to join the battle.
Nika Night Kai Luffy, Demon Nine Swords Style Zoro, Demon God Wind Leg Sanji, Top Buddha Robin...
When the Straw Hat Pirates appeared, the whole world was shocked...