Zeus' Master Bolt

The Master Bolt is the symbol of Zeus' power, which all other lightning bolts are patterned after. It is the first and most powerful weapon that the Elder Cyclopes made for the Olympian gods.
However in world Zeus' Master Bolt is the most powerful weapon someone could possess as it was used during the Titanomachy to defeat the Titans, it is one of the few weapons known to mortally wound, the supposed immortals in the word. The javelin is quite capable of huge devastation to a city, dealing the power of Zeus through lightning, thunder and radiant energy.