This just in from Smogon:
Many argue that the most broken move in Pokemon is not Stealth Rock, but a different move.
More broken then Garchomp. More annoying then Wobbofet. What is it?
Ice Shard.
"Ice Shard?" you ask. Why yes, Ice Shard.
How is Ice Shard breaking the metagame? Basically, it has done the same thing as Stealth Rock:
made certain Pokemon UNUSABLE. All of the big four dragons; Salamence, Dragonite, Flygon, and
Garchomp; can be OHKO'd by an Ice Shard from a Life Orb max attack Weavile. Additionally, as
Ice Shard automatically goes first, it has no counters, meaning that many may have to bring in
Ice Shard counters and walls in order to use dragons in general, and many other Pokemon. Grass types
such as Roserade have become difficult to use as their small defenses are unable to keep the
power of Ice Shard at bay.
In order to cotinue to improve the metagame, Ice Shard shall be banned until further notice.