Kikoku (Extra Utilities 2)

The Kikoku is a weapon added by Extra Utilities 2. It is one of two powerful weapons added by the mod that uses Opinium Cores. It has unlimited durability, can hurt players in creative/Godmode, pierces armor, can be enchanted with any enchantment up to twice the normal level cap, and deals points of damage (twice as much as a Diamond Sword).

Trivia
Kikoku is a reference to Trafalgar D. Water Law's sword from the anime series One Piece.