When Breath of Darkness Down your Spine targets The Endless Dark with a Power, which effects don't work there?

When Breath of Darkness Down your Spine targets The Endless Dark with a Power, which effects don't work there?

Effects that can't resolve:
  • Anything that interacts with adjacent lands, including Push and Gather (since there are no adjacent lands);
  • Invader Actions;
  • Anything conditional on having a particular terrain or being Coastal;
  • Anything that references the board that target land is on.
Effects that do resolve, but generally not in a useful way:
  • Defend and other Damage penalties to Invaders;
  • Isolate;
  • Skipping Invader Actions.
All other standard effects (Fear, Damage, Destroy, Remove, Replace, Add, Upgrade, Downgrade) work as they normally would, albeit with the exception that adding Blight doesn't destroy Presence or cascade, since the Endless Dark isn't a land. (Thematically, there isn't a real ecosystem to damage.)
The Endless Dark counts as "target land" for the purpose of resolving any of the Power's effects, since that's meant to refer to the place you are targeting rather than being an additional check if that place is a land.