Dead by Daylight

THIS CAN AND WILL UNLOCK FROM JUST PLAYING THE ONI
but if you don't know about the power of the oni already read below and it will explain what it is and how it works ( info is written from the game, not me ) and I will also go over some tips and things to hopefully get the achievement done faster ( dependent on your games )

YAMAOKA'S WRATH:
Absorb Blood Orbs left by your injured foes. Press and hold the Power button to absorb Blood Orbs in the environment and fill your Power gauge. When your Power gauge is full, press and hold the Active Ability button to initiate Blood Fury.

Blood Fury:
While Blood Fury is active, The Oni becomes lethal and gains access to additional abilities: Demon Dash and Demon Strike.


SPECIAL ABILITY: Demon Dash
Press and hold the Power button while Blood Fury is active, to perform a Demon Dash. This ability allows The Oni to cover large distances rapidly.


SPECIAL ATTACK: Demon Strike
Press and hold the Attack button while Blood Fury is active, to perform a Demon Strike in the direction you are facing. Demon Strike has an extended Lunge range and successful hits immediately put healthy Survivors into the Dying State.

Now, downing survivors with the oni can be easy or difficult depending on how experienced you are, how good the survivors are and how helpful the add ons you are using are. that being said playing him and learning the character will make it easier but he is considered 'hard ' so that may take several hours of practice to get really good.

It is important to note that when you are in 'demon dash' you have limited turning while running really fast across the map is useful and can get you downs on survivors not paying attention, but using it while in a chase already won't really benefit you as you can still use the 'demon strike' when just walking normally and it makes it far easier to aim and land a hit.

There are add ons to turn quicker while dashing but those won't really make it much easier to get downs while in a chase.

it does help if you can catch people off guard such as healing or somewhere they would be trapped, so perks like 'a nurses calling' or 'bitter murmur' may be useful to use as they can show you where the survivors are when they are healing(a nurses calling) or have just completed a generator (bitter murmur)

Overly the achievement will come with time and it is not much you can do to speed it up to other than learning the killer I will leave a list of his add ons below so you can find ones you may find useful, good luck.



Yakuyoke Talisman}}
Slightly increases Blood Orb Absorption speed.

Rotting Rope}}
Slightly increases Blood Orb Aura Detection range.

Cracked Sakazuki}}
Slightly reduces Blood Fury Activation time.
Slightly reduces Blood Fury Deactivation time.

Blackened Toenail}}
Slightly increases Absorption Movement speed.

Polished Maedate}}
Slightly increases Yamaoka's Wrath Passive Charge rate.

Ink Lion}}
Slightly reduces Blood Fury Activation time.
Slightly reduces Blood Fury Deactivation time.
Moderately reduces Blood Fury Duration penalty when downing a Survivor.

Chipped Saihai}}
Slightly increases Blood Fury duration.

Child's Wooden Sword}}
Moderately increases Blood Orb Aura Detection range.

Bloody Sash}}
Moderately increases Absorption Movement speed.

Yamaoka Sashimono}}
Moderately increases Blood Fury duration.

Wooden Oni Mask}}
Slightly reduces the Passive Blood Orb Drop Rate cool-down.
Survivors drop 1 extra Blood Orb on Game Events.


Shattered Wakizashi}}
Moderately increases Yamaoka's Wrath Passive Charge rate.

Scalped Topknot}}
Considerably reduces Demon Dash Activation time while Blood Fury is active.

Kanai-Anzen Talisman}}
Moderately increases Demon Dash Movement speed while Blood Fury is active.

Tear Soaked Tenugui}}
Considerably reduces Blood Fury Duration penalty when downing a Survivor.

Splintered Hull}}
Moderately reduces the Passive Blood Orb Drop Rate cool-down.
Survivors drop 1 extra Blood Orb on Game Events.


Lion Fang}}
Considerably increases Blood Fury duration.

Akito's Crutch}}
Considerably increases Demon Dash Movement speed while Blood Fury is active.

Renjiro's Bloody Glove}}
All Survivors can see Blood Orbs.
A Survivor's Aura is revealed for 2 seconds whenever they come into contact with a Blood Orb, absorbing it in the process.
This effect stacks for each Blood Orb absorbed.


Iridescent Family Crest}}
While Blood Fury is active, missing a Demon Strike will cause all Survivors within 12 metres to scream and reveal their current location to you.

This is more of a note rather than a guide as the original one works as well:

Downing people by tapping the melee button during Blood Fury works too, it doesn't just have to be with a charged Demon Strike or a hit while demon dashing. Do keep in mind that the swing is incredibly short, but the hitbox seems wider than usual(?)