the thing is that you can't cancel an action with escape or another assigned key as far as i've seen. Only thing that works is clicking on an empty tile. This can cause player to misclick and you can't take back the action when it's done. It's habitual for me to click on the character to change the command but when i click on the char without cancelling attack order, it gets damage. It works differently than most tactics games i played
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Once a sequence is confirmed (you used the first card), you can't cancel it by design, it's part of the strategy to decide when to commit.
Any unit must be able to target itself because it may want to heal, apply shields or other effects to itself too.
In the future maybe I'll a double click for confirmation so to prevent misclicks.
Thank you for the feedback.