You’re forgetting Kyurem-White. There’s a reason it’s Ubers. (Search me why Pokemon GO calcs show that it will be better than Rayquaza. Oh well Rayquaza will get it back when it gets it’s Mega...)STAB Ice moves would make a real dent in opponents, provided that the user had a high enough offensive stat and that the move had high enough base power. Unfortunately, that combination is very, very rare. Ice Beam and Blizzard are powerful moves, but there are no good Ice-type special attackers. There exist Ice-types with high Attack, but no (non-signature) high-power physical Ice-type moves. Exceptions do exist, of course, but they tend to be badly hemmed by a lack of Speed and/or coverage moves.