>>715919210
guardian spirit skills are the new yokai abilities and you can summon yokai as onmyo spells to do some type of attack or something like a yokai ability.
The flip kick in this webm is an example of one of the skills. In the beta each guardian had two and you can have different guardians in samurai/ninja modes.
You can also use GS skills to fully interrupt red attacks (which happens in the video), which otherwise can be parried with the mode swap button.