| Required class | Demon |
| Knowledge category | Demon Warp/Scar |
| Required powers | Pathway to Hell 1+ |
Crystal devils grow in large caverns below the rocky plains of hell.
Using this warp on your eyes causes your Demonic Rage power to grant bonuses to Ascendancy, Protection and Power instead of Attack, Defence and Damage. If you also have the Devil Spawn talent, the bypass bonuses will apply to Burn, Freeze and Shock (all based on your naked Aura) instead of Cleave, Pierce and Smash.
Using this warp on your head will replace your Inferno power with a new ability called Crystal Vortex. This is activated like a headbutt, but operates like the Shadow Infusion power, except that it only stops energy damage.
Using this warp on your skin will make it very hard but rather brittle when exposed to the air. Every unarmoured part of your body (except feet) gains a natural armour of +1% vs all damage types for each rank you have in Demon Form, and +5% vs cut and stab, +2% vs crush, shock and poison, and +1% vs heat and cold, for each rank you have in Tainted Flesh. You also gain +1 auto-absorb vs physical and half that vs other damage types for each rank in Tainted Flesh, and gain the Tainted Flesh immunity bonus if the location is unarmoured.
Using this warp on your arms provides +1 bypass per rank for all heat, cold and shock damage spells you cast with your bare hands.
Using this warp on your legs causes Evasion to work differently for you: The cut, stab and crush immunity will be replaced with heat, cold and shock.
In human form you may use this knowledge for Ritual Scarring. Placed on your forehead, this scar gives the same benefits as the eyes warp, as well as giving your magical rage an additional +5 Ascendancy and Protection per rank.