Prerequisite: You must be proficient in perception
You have learned to train your eyesight so that you can see far and precisely.
You gain 90 ft. of Darkvision. If you already have Darkvision than your Darkvision improves by 30 ft.
You can use a bonus action to look farther than most people are capable of, seeing a 100 ft. cube up to 5 miles away. (This distance increases by 1 mile for each 20 ft. you are above the ground.) You cannot see things directly behind an object, unless you can see over it. Once you use this feature you cannot use it again until you take a short or long rest.