Obsidian

Description

Obsidian. A vitreous material known since earliest civilizations that was among the first materials to be used in the creation of blades.
Unlike any other rock or mineral though, obsidian's edges possess an unmatched sharpness, causing the weapons forged with it to have immense value and rarity.
It is said that a slash of a sword made of obsidian is as silent as a whisper, making it the greatest weapons for history's most famous assassins; but in the hands of a ruthless, it will only leave behind an unannounced massacre.