Ghoul King is talking about regular ray...
ftr I can't explain as well as better OU players but in general its just too powerful. 105/150/90/150/90/95 is too much for a lot of mons to deal with, and a lot of coverage plus espeed makes it hard to revenge. it isnt really borderline either, clear ban,
my thoughts in general about uber unbans that have and havent happened yet.
deo-n and deo-a: oh god we dont want the whole tier that doesnt have priority ohko'd so no thanks
groudon: ehhhhhh it seems too powerful imo. it is hard to revenge with its insane bulk, and can run rocks and many different moves, it is not fully predictable. as well as sd/rp to boost up. do not unban imo.
xern: 126/131/95/131/98/99 with excellent typing is a lot to deal with, and it has enough coverage as well as potential for aromatherapy support. this will be worse than genesect, do not unban.
deo-d: unban, it'll be a decent spike setter like someone said and in general just a good bulky mon.
deo-s: revenge killer, but its power really isnt that great. i vote unban, it doesnt have LO or atk/spa EV support making its power enough to effectively revenge.
gira: this one is iffy. we are trying to get it unbanned in no status currently, but honestly its borderline here. it can still effectively play support. im indifferent to ban or unban, but am leaning towards unban.
lugia: this one hasnt been suggested afaik, but i think itll be ok. it loses multiscale, and when a mon like lugia has reliable recovery to ressurect the multiscale its just a bad idea. now it doesnt get its lefties or its defensive investments, and loses multiscale. i think itll be a great mon for stall but i dont think itll be broken. i vote unban.