Regular Reinforcement Scales 12% for Strength to increase your AR.
Unique Upgrades are performed by any Blacksmith or by using the Weapon Smithbox. However, only the physical weapon will do damage magic will not affect ghosts, even if this weapon is equipped, and the player will not be able to block ghosts' attacks with a shield. It is NOT dropped by the other ghosts, they drop Jagged Ghost Blades.
'One of the cursed weapons which can inflict damage upon ghosts.' How to Get / Where to Find the Ghost Blade The ghosts of New Londo clutch this wickedly sharp dagger with their bony hands and make mincemeat of the living.' Ghost Blade is a Weapon in Dark Souls and Dark Souls Remastered.
