Here is the chapter with corrected punctuation and spelling:
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Dexter walked in the streets of the ruined city. There were rotting bodies and monster corpses everywhere. Weeds had already begun to grow on the abandoned buildings.
Dexter suddenly sprang forward. He ran up a tall building, which was over thirty meters tall, and he landed on top and surveyed.
About a hundred-plus meters away from him was a very tall tree. Although not as tall as the building, it was taller than what was normal.
"So that's the tree where the bird's nest is," Dexter mumbled as he looked at the surroundings.
He couldn't see the bird that he was looking for anywhere.
'A giant bird on fire? If its nest is in that tree, it won't be too big,' Dexter thought to himself, and then he decided to wait for the bird.
He sat cross-legged on top of the building, comprehending more of the sun god art.
'Interesting. Using spirit energy this way instead of going with already-created skills? Regulating and directing the energy... Hmm... skills are better,' Dexter thought as his expression became nonchalant.
Apparently, one could create their own techniques and skills. But there were numerous skills to be gotten from killing creatures. Also, once you learn a skill, it becomes a part of you, using it comes like a natural thing.
All of a sudden, Dexter looked to the side, hearing a loud flapping sound. He saw a really big bird, which was almost the size of the tree, flying.
Its body was lit on flames, and its speed was nothing to scoff at. It sped past Dexter, making the resulting wind want to blow him off the rooftop.
Dexter smiled as he went with the wind, going towards the bird with a creepy smile. Golden sprouted out of his back, and the star phaser appeared in his hand.
He flew forward at great speed, using force release to boost himself further, closer to the bird.
The bird, noticing that something was following it, glanced back. Its eyes seemed to be lit on fire, and it turned around and let out a loud screech towards Dexter, as if warning him.
Dexter chuckled as his spear was suddenly lit on golden flames. He boosted forward again towards the bird, and the bird too flapped its wings, going towards him with great speed.
"Oh no, you don't!" Dexter shouted as he swung his spear towards the bird, but it passed him before he could even swing, and it caught him off guard again.
Another cut appeared on his chest, and his chest caved in as he received a heavy attack.
The black shirt was torn through, and the black armor was reforming like liquid on his body.
'I couldn't see it...'
The creature's movement was instantaneous. It was almost thirty meters away from him, and its speed suddenly became that of sound as it passed through him instantly, knocking him further down.
It was its beak that hit him. It was like a bullet which was as heavy as a mountain. Unpredictable! Fast! Powerful!
The bird sensed danger after Dexter managed to scratch it, and then it used its ultimate move immediately.
Dexter looked and saw that the bird flew upwards again, and then he stretched his hand towards it.
The wound it had on its leg suddenly widened as blood formed a single sharp blade.
The blade then stabbed deeper into the blood, and the bird instantly lost its momentum as it screeched loudly.
It shook its head as it saw Dexter below, and it blew out a stream of flames as it fell towards the vampire below.
'First art... 10 death waves!'
Dexter waved his spear, releasing a thin arc of fire which sliced the air as it went towards the bird.
Dexter's speed was phenomenal as he spun the spear in his hands efficiently, and then he waved his spear ten times at the bird.
The bird wasn't able to break from free fall as it felt something in the wound on its leg constantly stabbing it and then it fell through a star shaped blade that cut through its feathers and skin then it screeched loudly in pain.
Dexter hovered in the air. He felt the wounds on his body healing quickly. Blood still dropped from his mouth as his rib cages caved in at the middle.
'Now that was tough... Ugh, and it's still getting back up.' Dexter sighed.