I don't like the idea of Stealth "Icicles" (Ice-type Stealth Rock). Yes, it would cripple Dragon-types, but would also nerf Grass- and Ground-types, such as Celebi, Landorus, Gliscor, and Torterra Hippowdon. Not to mention that it would put more pressure on Flying-types, which already have to deal with Stealth Rock. Speaking of the aforementioned Celebi and Gliscor, they are counters to Keldeo and Terrakion, respectively, and would take 25% and 50% damage from Stealth Icicles, respectively. This would make them much more easy to deal with, possibly make them defeatable by what they were supposed to counter, thus making Keldeo and Terrakion even more dominant than they already are. Unless Generation VI also introduces a more plausible counter for the aforementioned Keldeo and Terrakion, I think that there are other, better ways to nerf Dragon-types. Maybe introducing a new type, or modifying the current type chart to make an already existent type, resistant to Dragon, and/or giving more weakness to Dragon-types (for example, it was been discussed on the making sense of type chart thread on the off-topic forum, that if Dragon-types are cold-blooded creatures, and for this reason they are weak to Ice, then they should also be weak to Fire).