Ninja Gaiden: Dragon Sword Nintendo DS

In ancient times, humans lived in peace with dragons. But then came the Dark Dragon, a malevolent giant that wasted no time in plunging the Earth into an abyss of darkness. Their strength drained by the evil of the Dark Dragon, the remaining dragons placed their last hope in the hands of the humans in the form of one of their own fangs. Thus was born the Dragon Sword, a formidable weapon inhabited by the very essence of the powers of the dragons. It was with this sword that the humans were able to defeat the Dark Dragon. In the countless millennia since, the dragons have long since perished. But their spirit remains in the form of that sword, now carried by the descendants of the humans that fought by the side on that fateful day.

Long ago, the Dark Dragon plunged the world into an era of chaos. Upon this eventual defeat, an enchanted sword known as the Dark Dragon Blade was created from its bones. This dangerously powerful weapon, infused with the malevolent spirit of the Dark Dragon itself, was entrusted to the care of a bloodline of humans known as the Dragon Lineage. However, evil beings, enthralled by its immense evil power, stole the Dark Dragon Blade. And once again the world faced the threat of eternal darkness .a young Ninja named Ryu Hayabusa, survivor of the Hayabusa clan and descendant of the Dragon Lineage, took up his family legendary birthright, the Dragon Sword, to face this threat alone. At the end of an intense battle, Ryu shattered the evil Dark Dragon Blade into countless shards with blow from his Dragon Sword. Six months have passed since what is now known as the Dark Dragon Blade Incident.