This section of Sekiro: Shadows Die Twice includes the description of the Loaded Axe - one of the prosthetic tools available in the game. You will also learn how to unlock and then use the Loaded Axe.
How to unlock the Loaded Axe?
The loaded blade can be obtained early on in the game, however, you have to unlock Access to Hirata Estates first. More information on that in the How to unlock the Hirata Estates? section of this guide.
Keep exploring Hirata Estates until you reach the Estate Path sculptor's idol. Go straight to the camp (avoid the enemies or kill them). Take the narrow path with stairs that will lead you to the guards engaged in a conversation. Sneak past or kill them.
Explore the side locations, most importantly the one shown in screenshot 1, where you can eavesdrop on the conversation between the next adversaries. Get rid of them and open the wooden shutter (screenshot 2). You can take the Shinobi Ax of the Monkey from the chest - it is necessary to craft the prosthetic tool.
Return to the Dilapidated Temple, and talk to the Sculptor again. Select the option to craft new gear and choose the Loaded Axe. The toll will be crafter without an additional fee.
Place the newly crafted Loaded Axe into one of the three prosthetic tools slots. During the game, you can switch between the available gadgets (by pressing triangle / Y).
Using Loaded Axe
Loaded axe allows you to mound extremely powerful axe attacks - they are slow, though. Theoretically, you can use this tool to eliminate any enemies, however, it is best used against slow enemies. A perfect idea to use this tool is to attack enemies with shields. First such enemies can be encountered when exploring Hirata Estates. A successful attack deprives your foe of his shield and leaves him vulnerable to your Deathblow.
Using Loaded Axe is not unlimited - each attack consumes 2 Spirit Emblems. Try limiting using this ability and reserve it to kill enemies with shields or resistant and slow opponents.