I think it's an autobattler. A dice rolls determine the power of each unit and then you arrange them in a certain way so that they'll be effective against the opponent. I had trouble understanding. Wonderful art.
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Thanks for playing, and thank you for the kind words about the art! You actually got it exactly right: it's an autobattler where each unit rolls its dice to get an effect, then you place them on the grid before the fight. Sorry it was hard to understand, we clearly need to explain the rules better in the game. Thanks for the feedback!