Chapter 671

Chapter 671 is called "The Gas-Gas Fruit".

Short Summary
The Slime continues to spit pieces of itself across the lake, poisoning the water in the process. Despite this, Sanji dives in and searches for the samurai's torso. Law asks Monet to accompany him through the laboratory, saying he has need of her "ability". Caesar Clown slips out of Luffy's hold, and demonstrates the combat abilities of his Devil Fruit as the two fight each other. Although Luffy appears unharmed after all of Caesar's poisonous and explosive attacks, he spontaneously collapses and Caesar laughs in triumph. Shortly after, Law suddenly falls down injured in the laboratory, before being confronted by a mysterious figure he appears to recognize.

Chapter Notes

 * Sanji jumps into the lake to search for Kinemon's torso.
 * Luffy fights Caesar.
 * Law collapses inside the research facility, as an unknown figure approaches him.