Cascade: If the land already has any Blight and you need to add another Bllight to it, you also add one additional Blight to any one adjacent land.

If that adjacent land also has Blight, it will then cascade again from there, etc.

Blight added as a result of Cascading also requires you to Destroy one Presence from each Spirit with Presence in those lands.

Destroyed Presence is placed next to the Island, not returned to the Spirit Panels.