Sekiro Prosthetic Guide: Sabimaru
The Sabimaru tool is unique because it gives you the ability to poison your foes. This definitely has its uses, though it's potentially not as valuable as some of the other more disruptive prosthetics like the Firecracker because it lacks the crowd-control utility that the latter would provide. That being said, the Poison status is handy in its own right for whittling away at tricky foes.
If you want to acquire the Sabimaru, it's a matter of going to Ashina Castle. Head to the chamber in the Upper Tower where the Idol is, and take out any roaming enemies who get in your way. If you wander around on the floor above the idol and pop out onto the railing inside the building, you'll see a samurai and some adds on the ground floor. Take them out to find a chest on that level which has Sabimaru, and take it back to the Sculptor to use it.
Sekiro Prosthetic Guide: Firecracker
This is one of the most useful prosthetics in Sekiro. It does its fair share of damage against animals, and it's also valuable because using it gives you the ability to divert the attention of your enemies enough to interrupt their attacks. In a title all about learning attack animations and responding to them, even the smallest reprieve from the cycle can leave you with enough of an opening to get a leg up on the bosses that are out for your blood.
The Firecracker costs 500 sen, and you can buy it from a merchant in the Outskirts Wall area who hawks his wares at the top of a stone tower by the Gate Path. Once you pick up the Firecracker from this merchant, get the Sculptor to pop it in and you'll be setting off sparks in no time.
Sekiro Prosthetic Guide: Mist Raven
The Mist Raven prosthetic is probably one of the coolest ones out there. It affords you the opportunity to maneuver more efficiently around your foes by giving you the power to move and dodge faster. To get this tool, you're going to have to loot the Mist Raven's Feathers item.
To find the elusive feathers, you first have to go to the Hirata Estate. When you reach the bamboo thicket, move to the ledge to the upper left of the Idol and take a dip in the river that you find. Struggle against the current before grappling to a tree and cutting down some bamboo to reveal an enemy. Once you kill him, you'll be able to access what he's guarding and pick up the Mist Raven's Feathers. Take those back to the Sculptor and voila!
Now that we've shown you how to get all of these cool tools in our Sekiro prosthetic guide, it's time for you to get grappling and exploring so that you can be the lethal shinobi that you were meant to be. Check out our other guides for tips on how to beat some of the mandatory bosses and also how to unlock all of the game's endings.