What happens to pieces left in a land when Deeps sinks it?
What happens to pieces left in a land when Deeps sinks it?
On the off chance that Invaders or Dahan survive the sinking,
they are cleaned up into the nearest legal land — this is not considered a move, is not an Action, and does not trigger anything, it is simply a correction of the game state. This happens only once you are not in the middle of an Action, and there are no pending triggered Actions (i.e., after each Action tree), just before checking for victory/defeat.
All other pieces remain where they are, which means they are now in the Ocean on that board.