For the Dahan Event "Retreat", are you being told to (on each board) Push 2 Dahan from a *single* land with a City, or could you Push 1 Dahan from 2 different lands with Cities? What happens if you can't meet the full requirements?
For the Dahan Event "Retreat", are you being told to (on each board) Push 2 Dahan from a single land with a City, or could you Push 1 Dahan from 2 different lands with Cities? What happens if you can't meet the full requirements?
You're being told to Push 2 Dahan from a single land with a City to a single land without a City. If that's impossible, but you can Push 1 Dahan following those constraints, do so. Otherwise, do nothing on that board.
"On each board" cares about the land the Dahan are currently in; it's fine to Push them onto a different board.
Like all instructions that don't involve targeting or "choose a land", if you can obey them, you must - eg, if there's a land with 2 Dahan and a City that happens to be surrounded by Cities, you can't point at it and say "we would Push those, but we can't because there are no legal lands", just as you couldn't subvert "Add 1 Blight to a Sands" by pointing at a Wetland and saying "It's not a Sands, so we don't add Blight".
