Bristly Bill's +1/+1 Counter

As a bonus action, you may choose one creature you can see to gain a +1/+1 counter for one minute. A creature with one or more +1/+1 tokens gains a +1 bonus to attack rolls, damage rolls, and armor class for each +1/+1 token they have, and loses all +1/+1 tokens either one minute after recieving the most recent such token, or upon falling unconscious. You have uses for this ability equal to your proficiency bonus, which all recharge on a short or long rest.

Once you reach 5th level, you may use an action to double the number of +1/+1 counters on all creatures that you can see until the end of your next turn. You may use this ability once per each long rest. In addition, attacks from a creature with one or more +1/+1 counters become magical for the sake of overcoming resistances.