Vexx SpiritStone

Concept art of a Spirit Stone.

Quote1 You'll find ancient ruins and burial sites scattered all over Astara. If you listen carefully, you can hear the last living moments of those who lie there, and the cries of tortured souls. Quote2
Darby, as heard in the Sound Options menu.

Spirit Stones, also known as Tomb Stones, are found throughout the game.

If attacked, they will shake and release health for Vexx. He can attack them as much as he likes, and it will never run out of health for him, rendering it very useful for when his health is getting dangerously low.

Occasionally, a small yellow harmless orb will float around the stones, from which distorted voices can be heard from, presumably spirits of the Astani people.