Ki is measured in thousands now, for some reason. You start with 1k HP and 1k ki, instead of 100 ki.
Your new 100-point stat is Yokai Force. It starts at 0 and fills from everything, doing damage, taking damage, absorbing amrita.
Enemies can drop Orbs now, that have stats like Charms.
You equip the Orm onto your Guardian Spirit. Orbs have an equip cost like jutsu. In fact, you can think of them like jutsu.
When you have enough Yokai Force, you can 'cast' the power of the Orb.
Yoki Orb, for example, turns you into a Yoki and you do a quick two-hit combo.
There's a new stat called Courage.
It only seems to control how fast your ki regens.
The Spirit stat is gone.