River rank gives you access to these perks:
River Prefix
/nick (nickname yourself)
8 sethomes (/sethome)
4 /ah slots
4 /order slots
/craft
2 playervaults (/pv #)
4 enderchest rows
Stream and river kits every 3 days
River: Protection 2, sharpness 2, efficiency 2, unbreaking 1.