Yokai Skills or Yokai abilities are special moves in Nioh 2. Yokai Skills are unlocked by obtaining, purifying and attuning Yokai Soul Cores. These special skills will enable your Guardian Spirits to do powerful new moves, and have special effects that will enhance your overall build.
How to get Yokai Skills
These skills are obtained from Yokai Soul Cores. You must defeat a Yokai enemy, and return to the shrine without dying to purify the core. You may then attune it in the shrine menu as equipment for you Spirit Guardian. You can unlock more soul core slots by progressing the main story.
How to use Yokai Skills
Activate Yokai Skill: Attune Soul Core to the Guardian Spirit. When you are in a mission and have accumulated enough Anima hold R2 and press Triangle, Square, or X (Y, X, or A for Xbox controllers) to activate your Yokai Ability.
Each Soul Core possesses a unique power, each requiring differing amounts of Anima to activate. Initially you may attune up to two Soul Cores to your Guardian Spirit and as you progress you will unlock a third attunement slot for your Guardian Spirit and a secondary Guardian Spirit which may be attuned with another three Soul Cores.
Yokai Ability Damage is based on the Attack of the melee weapon you are currently using and any relevant Special Effect modifiers.
How to gain Anima
Anima is gained as you perform melee attacks on an opponent. Some Guardian Spirits and Soul Cores may provide you with alternative methods to increase your Anima, or make it faster.
The Scampuss yokai will fill out your Anima bar as it rolls around when it is following you.
Yokai Skills List for Nioh 2