Do Adversary effects based on lands (e.g., the loss condition of the Kingdom of England) work in The Endless Dark?

Do Adversary effects based on lands (e.g., the loss condition of the Kingdom of England) work in The Endless Dark?

No, The Endless Dark is not a land for Adversaries.
In particular:
  • The Kingdom of England can't count The Endless Dark as a "Proud and Mighty Capital" to cause a loss.
  • The Habsburg Monarchy (Livestock Colony) can't make Towns Durable there with "Herds Thrive in Verdant Lands."
  • The Habsburg Mining Expedition can't match The Endless Dark with its Salt Deposits card, nor can Russia match The Endless Dark to a Ravage Card via "Competition Among Hunters."