This means you better defeat Bloody Finger Okina to get the Rivers Of Blood Katana.

The exact location of Okina and Rivers Of Blood is shown on the map below.

The moment you beat Bloody Finger Okina in battle, you will receive Rivers Of Blood as a reward.

A close-up of the in-game image of the Rivers Of Blood Katana in Elden Ring.

Thereafter, it’s possible for you to find it in your inventory if you wish to use it.

Part of the map of the Mountaintops Of The Giants in Elden Ring, with the path to the Rivers Of Blood Katana highlighted in yellow.

Screenshot of the Tarnished in Elden Ring wielding the Rivers Of Blood