The Lithos species, vassals of the Commonality, are inherently psionic. Their mineral physiology is interlaced with thing strands of psi crystals, which resonate with their moods and environment. This resonance can be used to induce resonance in other bodies of minerals within the environment and in the bodies of the Lithos.

A Lithos psion can create localised tremors in the earth that throw other creatures off their feet, or solidify their outer skin into armour. They can derive sustenance from psi crystals, and refine this process to extract tremendous energy from these chunks of condensed psionic energy. Prior to their being brought into the Commonality, the Lithos did have some proficiency with their psionic abilities (and categorised their powers with length poetic names referencing their mythology). Under the tutelage of the Elysians, however, the applications for their peculiar, matter-focused abilities have broadened considerably.