A Broken Sky
Energy stones are translucent rocks ranging in size from a quarter to a man’s fist. They come in a variety of flavors each containing different powers. Their applications are numerous, but a partial listing follows:
A wizard may study a stone in order to scribe new spells into their spellbook; the exact spells available depend on the imperfections of that particular stone, with a given piece offering 1-3 spells that share a theme. Characters with Scribe Scroll can cut and file the stone into a brittle state that retains most of the stone’s energy. A Spellcaster may shatter a stone so prepared in order to produce a one-time spell effect. Trainers may alter their pets’ development by feeding them stones, or in some cases simply exposing them to a stone’s radiance. A Fire Stone might turn a wolf into a Hell Hound, for instance. Conjurers who favor callings often use energy stones in their binding circles or in their offerings.
Characters with Craft Staff can set polished stones into a wood or metal frame to create a flexible and repeated-use magic battery. Those with Craft Arms and Armor often blend powdered stones to affix Flaming or similar enchantments. Many Rings or Wondrous items draw their power from an intact stone as well. The largest of these gems power airships, weather control devices, and other large-scales works of engineering.