Click the "combat icon" next to your character's portrait... just like you do to cast a spell during combat. One of the small icons on the big "combat icon" controls the dracon's "breathe acid" ability. It looks like a small dracon head. If I remember correctly it is on the right-hand side about three-quarters of the way down. Sorry but I don't have a dracon in my current party . I hope this helps! If it makes no sense, please tell me and I will try again .
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