Blackbeard has a bounty of 3,996 million berry, and is one of the "Four Emperors" of the New World and a member of the "Evil Generation".
Reilly admits that his strength is no longer as good as when he was younger, and he can't compete with top powerhouses like Blackbeard, and he once said that the current world of pirates is no longer what it was when he was young, and that new generations and new forces have risen. This shows that the situation in the world of pirates has changed a lot, many new forces are rising, and Reilly, as a representative of the old era, has also been surpassed by the new forces.
Blackbeard has the ability of the natural Dark Fruit, which can manipulate the darkness, attack, retreat and defend, and is extremely cunning. He also has the ability to use multiple Devil Fruits, making his strength even more terrifying. In addition, he was an excellent military commander and was able to use various opportunities to increase his power and influence.
Blackbeard is ambitious, individualist, and opportunist, always aiming for his own interests. He is ruthless and unscrupulous in pursuit of his goals, and is an extremely ruthless character. His presence shocked the entire pirate world, and his ambition and strength were intimidating to many.
In One Piece, Reilly once commented that Blackbeard was an underrated Four Emperors. This is because Blackbeard is very powerful, but he also doesn't rely entirely on the Devil Fruit's abilities. During the battle with Redhead Shanks and Bucky, Blackbeard showed a very strong physical skill, leaving Shanks with three visible scratches. In addition, he has also demonstrated a unique ability to use and master Devil Fruits, and is able to use multiple fruit abilities.
In order to realize his ambitions, Blackbeard decides to capture Luffy in exchange for the privilege of becoming the "Seven Martial Seas of the King". He plans to use this privilege to enter the prison and thus invite more powerful people to join his pirates. By chance, he meets Ace and captures him instead, thus triggering the Toptop War.
He hopes to weaken the forces of both sides by pitting the Whitebeard Pirates against the Navy Headquarters and take the fruits of Whitebeard in the chaos. In the end, he became the biggest winner of the Top-Up War, and successfully invited many powerful characters to join his pirate group.
Overall, Blackbeard is a very powerful Four Emperors, and his strength and ambition are daunting. Although he was once underestimated, as the plot develops, his true strength is gradually revealed.