The damage from destroying your Presence is part of the same action because the Special Rule says "When you destroy your Presence..." – it modifies how other actions work while they're happening. Tags: Destroy, Saved From Destruction, Action Modifiers, Damage, 25 more...
How does All Things Weaken interact with Heart of the Wildfire? When Wildfire places Presence, does it then destroy its own Presence?
No. All Things Weaken modifies how Presence destruction from Blight works, but doesn't change the source of the Blight, so Wildfire is still protected from Blight added due Spirit actions. This also applies to the portion which reads "...and 1 Presence in an adjacent land": if you choose Wildfire's Presence as the 1 Presence to destroy, it will survive if the Blight was added due to a Spirit Action.
While Volcano Looming High isn't protected from Blight added by Spirit Actions in general, it does have similar protection from Blight added by its Explosive Eruption Innate Power. In that one particular case, all of the above applies to Volcano Looming High as well. Tags: Actions, Blight, Blazing Presence (Heart of the Wildfire), All Things Weaken, 3 more...
This can happen with "Flowing and Silent Forms Dart" by in concert with anything that adds Blight one after another in multiple lands, like cascades or Volcano's "Explosive Eruption". Tags: Destroy, Saved From Destruction, Blight, Presence, 8 more...
A land is always at exactly Range 0 of itself, and therefore "within Range 1," "within Range 2," etc.
If a land meets a particular condition (e.g., "with Dahan"), it's its own "nearest land" meeting that condition.
Isolating a land doesn't change any of these answers, since none require checking which other lands are adjacent.
For some practical examples:
It's impossible to Push a piece from a land to itself or Gather a piece from a land to itself, since those move to/from adjacent lands.
The threshold of "The Land Thrashes in Furious Pain" (Major Power) can't Repeat that Power on the original target land, since that land is not adjacent to itself.
The first threshold of "Explosive Eruption" (Volcano Looming High's left Innate Power) can deal damage in the target land (the land where the Power destroyed Presence). Also, the third and fourth thresholds of both deal damage in the target land.
During the Dahan Insurrection Scenario, if a City is destroyed in a land with Dahan, then "Military Response" adds a Town in that same land because there is no nearer land with Dahan.
"Exports Fuel Inward Growth" (The Kingdom of Scotland Level 6) adds Towns to a land with Towns/Cities even if there are no adjacent Towns/Cities (either "naturally" or due to Isolate). Tags: Isolate, Push, Gather, Range, 27 more...