D&D 5th: Demon Tower of Madness
Pearly White Spindle
Ioun stones are named after Ioun, a god of knowledge and prophecy revered by sages and seers. How they came to be attributed to the god is a hotly debated topic among Ioun’s faithful, but it remains a mystery. Some believe that worshipers of Vecna, the undead god of secrets, stole and hid this ancient lore.
When tossed into the air, one of these tiny gems orbits the head of its owner and confers a benefit based on its color and shape.
Property: As an action, you can release an Ioun stone into the air. When you do so, it orbits around your head at a distance of 1d3 feet. Thereafter, the stone must be grasped or netted to separate it from you. You can voluntarily seize and stow a stone, and the stone’s effect ends immediately.
Pearly White Spindle (Legendary): Each hour, you regain 1 hit point.