New idea for game card

I think they should add a railroad card.How would it work? You can Use a Card "railroad" That allows you to plant Rail tracks on spaces,What it does it when troops move on Any spaces with them they dont lose Movment Until they Move to a space without Tracks ,you can Connect the tracks allover the map As You countinue to buy more (you will need to be high level to Get them) Please Help me get this idea for a future update

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