One Piece: Ghost Swordsman's Revenge Diary

Sashi Slok is a man who survived the Navy's demon-slaying order, and his left hand was injected with the demon virus. Form the 'ghost hand', comprehend the fluctuating swordsmanship, summon the sword soul Kazan, corrode Pulimeng, Frost Saya... With the power brought to him by the ghost hand, Sashi embarked on the road of revenge against the naval admiral [Grey Dove] who executed the demon-slaying order, and became a great big pirate!