Ace's Devil Fruit ability did indeed counter Crow's Devil Fruit ability to a certain extent.
However, capturing and killing Crow in a short time was no easy task.
After shattering Crow's airborne wind-form with a single strike, Crow, whose true body had already returned to the ground, launched an attack at Ace in the sky.
Both were Logia users, but Crow's use of his Devil Fruit ability was far more nimble and proficient than Ace's.
Spikes formed from coal dust and coated in Armament Haki shot toward Ace in midair.
Ace did not lower his guard just because he had successfully shattered Crow's clone. Although his attack had landed, he felt that a Revolutionary Army commander would not be so easy to deal with.
That caution allowed him to notice the attack coming from the ground.
"When did he return to the ground?"
"Was it the instant his body exploded?"
Such doubts arose in Ace's mind. Throughout the battle, his Observation Haki had been locked onto the other man's presence. Yet unfortunately, Ace had failed to notice that Crow had already shed his shell, leaving only a false body in the sky to draw his attention.
Though puzzled, Ace's movements were not slow in the slightest.
He did not use his Devil Fruit ability again. Instead, Ace swiftly turned, borrowing the momentum of the rotation as he fiercely swung the long sword in his hand toward Crow on the ground. A blue-green slash shot directly from the blade of Famous Sword 'Ace'.
The powerful sword light shattered the incoming coal needles in midair, then continued onward without losing momentum, flying straight at Crow.
"A slash?!"
Ace was clearly a Devil Fruit user, yet when dealing with his ambush, he had used a slash instead of his Devil Fruit ability. That