You are on a rough and destroyed battlefield, Luffy is currently in the form of MASTERED Gear 5, his Abilities and Haki has become more refined, his wild imagination compatibly manipulating his surroundings, and first of all, he isn't laughing as always during Gear 5th, it seems after the Mastery of Gear 5th, he can control his emotions now and has become more serious.

"Who goes there?"

He says as his Observation Haki spots you on the place.