Power of Two Devil Fruits of Blackbeard - One Piece

 Who is Whitebeard? Well! Whitebeard is said to be the world's strongest man in the world, after the death of Pirate King, Gol D. Roger. Whose real name is Edward Newgate in One Piece series. Whitebeard is also the captain of Whitebeard pirates, where he lets his members call him Pops meaning old man and in return, he calls all of his members as Son. Likewise, Whitebeard has the title of one of the 4 Emporers that ruled over the New World. However, at the age of 72. Whitebeard decides to rescue Fire Fist Ace from the Navy. Whitebeard's ate the Gura Gura no Mi Devil Fruit which made him "quake man."

Gol D. Roger and Whitebeard 

By accumulating all of his members in order to evacuate Portgas D. Ace who is the actual son of Gol D. Roger. At next, we have Blackbeard. His real name is Marshall D. Teach. Who was the former captain of Whitebeard. Nonetheless, Blackbeard betrays the Whitebeard by killing Thatch and stole the Dark Dark Fruit where he become tremendously powerful since he ate the Yami Yami no Mi Devil Fruit. Blackbeard plays the role of prime antagonist in the series because he reaches at any place where he can get benefits for himself. 

Marshall D. Teach a.k.a Blackbeard 

After fighting mercilessly with the Navy by Whitebeard pirates. The Admiral Akainu tricks Squard by manipulating the stories to him saying that Whitebeard is a traitor because Whitebeard likes only Ace. Moreover, his only intention is to clear Whitebeard pirates when battling at Marineford. Thus, Squard stabs Whitebeard without giving a second thought. As he was scared to lose his comrades unlike his past. In contrast, Whitebeard is extremely cool and smart old man who didn't take any action since he knew there was someone behind that masterline. Nevertheless, Whitebeard dies during the battle of Marineford, after severely getting injured.

Whitebeard Stab by Squard 

All of a sudden, Blackbeard pirates enter the fight and starts challenging Whitebeard in order to steal the power of Tremor Tremor Fruit of Whitebeard. At first, Blackbeard shows his power of darkness. However, Whitebeard gets annoy with Teach's actions where he lost his 2 sons such as Ace and Thatch though they were not biological his own sons but he cared a lot about his sons. By the time, Whitebeard fought with Blackbeard pirates. Edward was almost dead because he was seriously wounded where he didn't get an opportunity to revive himself. Additionally, Whitebeard was already getting weak due to his sickness. 

Thatch and Blackbeard 

Therefore, Whitebeard dies at the end. Although he was the world's strongest man because Whitebeard tells his pirates not to interfere when fighting with Blackbeard pirates. 1st division Commander Marco tries to aid Whitebeard but he doesn't join his fight as Whitebeard is his Pops. 

Whitebeard's Extremely Injured 

So, Marco does not make an intrusion. However, Whitebeard gets defeated and covers Whitebeard's body with black cloth and Teach gets under that cover for the operation purpose. Most surprisingly, when Blackbeard comes out he has already stolen the power of Whitebeard's Devil Fruit which not only makes everyone astonish but also proves his power to the entire world. This is how, Blackbeard gets the power of Two Devil Fruits.