1. Heal himself. Sadly he cant heal others only himself. Its helpful since he cuts himself or cuts off a limb a lot.

2. Be able to read minds. However this ability has limits! He can only read the minds of family members. That isnt limited to blood however- like if someone were to date blackout then he could have a weak connection to their mind- it would be a full connection should someone marry blackout-

I say blackout because akuji ain't a romance person-

3. Take his brothers sight. Akuji is blind. However because of the wweire connection him and blackout have he can cause blackout to go blind and akuji would be able to see while his brother is blind.

4. Fusion. If wanted akuji and blackout could fuse

5.  He can pull out his brothers soul and expose his emotions to everyone-
6. If blackout were to be angry akuji could reach down into the bottom of blackout's soul and yank the anger out  and make blackout pissed-