One Piece: Opening Sombra Corps

In 1494 of the Sea Yuanli, the Black Charcoal Orochi, Black Charcoal Muchan, and Black Charcoal Ritui secretly killed Koyuki Shouki, seized the position of general, and even joined the beasts Kaido, and the whole country of Wano fell into panic.
"The country of Wano, I don't like it, and it's not your turn to get involved, Kaido, Orochi, give your heads."
A man named Kozuki Seimei led the Black Shadow Corps to return from purgatory and regain control of Wano Country.
Kill the black charcoal snake, defeat the Beast Pirates, chase Kaido to the West Sea...
Leading the nine shadow generals and eight demons under his command, starting from the country of Wano, and conquering the entire world.