So, I don't want to cause problems if this is some test spell that never made it off the dev slate (especially because the spell is 'Uncategorized' and not 'Paladin - Retribution'), but I was looking through the spells and found some interesting ones.
Particularly this: The Reach of Justice
I don't know the Retribution abilities well in Legion but I think that's pretty much all of our damage sources except Melees at 40 yards. Obviously Melee is pretty relevant, but this could still have a lot of interesting use in PvP and in target switching fights in PvE. I mean, you don't need a gap closer if you can do 90% of your damage from 40 yards away...