OK NOTE, THIS IS THE SWORD MAIN CHAR WILL HAVE IN MY MANGA
Name

arkh
Description:A sword with a black blade and a strange red symbol added in the center of it, the blade itself is weighless to the user (Hakaru Shinji) as its his Soul Weapo (be explained in the manga xD) but whenever someone else tries to grab it, its weight is unmatched. This type of sword is unique as this doesnt happen a lot. This sword has been the soul weapof for most of the Hakaru family.
Abilities: Shinji is able to run his flames threw the sword without melting the blade and like this makes the blade much stronger. Shinji is able to summon this sword as long as he has a bit of psynergy left and... well yeah xD you get the point. The first time this sword revealed itself to Shinji, he went in a state of berserker, making him much stronger, faster and unpreditable. Shinji doesnt remember this and since then this has not happened to him.
Legen Behind Creation: No one knows exactly who made the sword or how it was made, as most of the Soul Weapons dont have a concrete past.