Traveling through the heavens from swallowing

Liu Mang unfortunately died suddenly due to working overtime all night, and traveled to an isolated island in another world. Just as he was about to start surviving in the wilderness, the system awakened!
What the hell are you asking for? Just open it!
After several worlds, including The Smiling, Proud Wanderer, One Piece, Naruto, Battle Through the Heavens, Liu Mang finally left the island. But when he returned to human society, he found that something was wrong with this world.
An unknown virus has spread throughout the world, causing heavy casualties among humans, but that’s not all: animals infected with the virus have evolved dramatically, and monsters have appeared!
Until one day, when familiar things and names came to him one after another, he realized that this was the Devouring Starry Sky, the Devouring Starry Sky of the Great Nirvana Era!
Under the threat of viruses and monsters, human civilization is in danger! Liu Mang traveled through time and space, with a system added to him. He has the world's best personal strength and masters many future secrets. What can he do for this bloody era?

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