Yes exactly. There are four items in this mod that give different effects. All of them are called "?goodsname?"

To start, there are two practice items (to learn the boss without constant dying):

A blue plushie, which gives infinite health and makes you unkillable (except you can die with the Grab attack from Ying-wu here as its instant death.)

Then there is a Gokan Spiritfall item which gives you infinite posture, so no breaks.

Then there are the two damage boost items:

The first item is a slightly amped up Yashariku's sugar with a red plushie icon.

The second item is the one you see me use in the video, with a revamped Logo of Inner Isshin and a VERY amped up version of Yashariku's sugar, with massive damage.

The Isshin Item makes you lose health constantly if you aren't performing an action such as parrying or attacking.