Quote Originally Posted by PotatoTree View Post
It's not actually regenerating. I'm not sure why they made it like that, but each arcana stone has a bunch of health bars, so when you deplete one, it will switch to the next health bar. The total health of a stone can be seen at the top of the screen.
That's because it's how it works in Lords of Vermillion. It has "Multiple bars" of health to indicate the phases of each break down of the Arcana Stone. Which I think is either 3-4. I forgot the exact number.