Sensory Boost

Prerequisite – 5th level

As a bonus action you can expend a superiority die to close your eyes and heighten your other senses through extreme focus. You gain advantage on all nonvisual-based perception checks you make in the next minute provided you do not move and keep your eyes closed. In addition, after using this maneuver, you gain Blindsight until the beginning of your next turn out to a range of 15 feet provided you keep your eyes closed. If you already have Blindsight, its range increases to 30 feet instead during this time. The next attack you make during this time adds your superiority die to the damage.