a small but fun fact, after blackbeard stole the devil fruit powers of whitebeard and used it to shake al of marine ford there was a global warning for Tsunamis, and sen'goko even states that he is just whirling the power arround like a child, beacuse whitebeard created local counter shocks to prevent the waves from travling to far from the combat
One of the last man Luffy would have to surpass to become pirate King, a man who served for 20 years as the gatekeeper to the title of King and who represents the pinacle of what Luffy's relationship with his familly should be.