The Blackened Sword

''This godslave relic was said to have once been carried by a knight sworn to the service of the Lord of Sunlight himself. The blackened blade was later snatched from a corpse by a disgraced warrior lost in a lightless place.''

This greatsword requires two hands to wield and can be reinforced as a weapon with titanite. It gains a +2 holy bonus to attack and damage against demonic enemies, and also deals an additional 2d6 damage against those foes. It is found after defeating Kelthor.