Editing Tytherion (section)

=Planar Traits=
* Type: Astral dominion.
* Size and Shape: Canyon maze about 100 miles across, 800 miles long, and up to 12 miles deep, surrounded by a belt of dry steppes 10 to 50 miles wide; bounded.
* Gravity: Normal.
* Mutability: Divinely mutable. (Deities control their own environs.)
* Alignment: Neutral Evil.
* Corruption: Attacks with the disease or poison keyword gain a +1 bonus to the attack roll. Healing powers restore only half as many hit points as normal.
* Necrotic Affinity: Attacks with the necrotic keyword gain a +1 bonus to the attack roll, and attacks with the radiant keyword deal half damage (ongoing radiant damage is not affected).