Rumble-Rumble Fruit

Generates and becomes lightning: it made Enel nearly a god on Skypiea, save for Luffy's immunity.

A lightning Logia, considered one of the most powerful of all: Enel becomes electricity, flies, strikes with millions of volts and, sensing everything through 'Mantra', believes himself a god. On Skypiea he was effectively invincible until he met Luffy, immune because he is made of rubber.