Eastern Nariyása is mostly flat, but there are some rocks and mountains in the central parts. Said mountains have a fair share of mining settlements, including the Justicariate.
Eastern Nariyása is drier than its Western twin. While there are many lush areas near coasts and rivers, there are much larger ones that are deserts and barrens. Season differ in the amount of rain more than they do in terms of temperature.
Eastern lifeforms are best compared to those found in Australia: they're peculiar, they're adapted, and they're often deceptively deadly. Poisonous animals and plants abound, and there is a large selection of subtle and nasty parasites.