Electro holds the number for letter D and is a staple Sinister Six villian
An unusually configured magnetic field was created when Dillon was struck by lightning while holding live, high-tension wires and a wound reel of one-inch cable, granting him superhuman powers. Electro can generate massive quantities of electricity, theoretically up to approximately one million volts. He can employ this electrostatic energy as lightning arcs from his fingertips, and his maximum charge is more than enough to kill a normal human (wikipeida)