7. DEVIL FRUIT
His devil fruit is called Gomu Gomu no mi that gave his the ability to turn into rubber after he accidentally ate it in anger. It was sitting on the table in a box and luffy just ate it, Shanks realized it and asked Luffy to not swallow it but it was too late and luffy stretched and hit the ground.
It gave him the ability to expand any part of his body even his blood vessels get stretched when blood flow increase during the second gear. He is immune to simple Punches, Bullets and heavy objects.
8. CONQUEROR’S HAKI
Only one in several million people have this ability. This type of Haki allows the user to exert their willpower over others. It is said that whoever possesses this type of Haki has the qualities of a king.