Petros, one of the two Slivers of Earth, governs shaping stone and imbuing the caster with the physical properties of solid rock. All Inanimae who know Petros can climb up a rocky surface with little difficulty. Petros is primarily practiced by the Glomes, but the Solimonds and Kuberas also have affinity for it.
- Living Rock - Shapes earth, changing its shape or composition.
- Stoneskin - Coats an object in protective stone, helping them to protect themselves against damage.
- Ironarm - Grants additional strength to a subject, granting them the ability to move heavy stones.
- Stasis - Slows down a target, causing them to barely move at all.
- Quake - Splits apart the earth, damaging people and things in the area.
- CTD: Inanimae: The Secret Way, page(s) 78-79