when you were born you relies that you are better at activities you are well suited in, even better at some experts.
you are able to use points to improve your self, your max is 2 x your proficiency bonus = max amount of points
when you roll a d20 for skill checks, saving throws or to hit, you are able to add any amount of points to that roll to improve it (e.g. use three points to increase the roll by three) but before you get the result
if you are not proficient in the skill or weapon you have to use double the points (e.g. use two points for the roll to increase by one)
you may increase any score of your choosing by one
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