Brionac

Brionac (ブリューナク) is a spiritual item in the form of a spear used by the Knights of England.

Concept and origin
Brionac is the supposed name of Lugh's spear, a deity in Irish mythology. It is a popular name for unique spears in Japanese video games, but has apparently never appeared in surviving Irish or Welsh texts.

Principles
It is a spear that can create five beams of light to shoot from its tip. These beams of light can either take a straight path or bend, and can do some serious damage when it hits something. This function is still present even after being broken in half.