Here's a niche counter if Kyu-B scares your team.
252+ Atk Life Orb Kyurem-B ExtremeSpeed vs. 252 HP / 252 Def Lapras: 68-79 (14.65 - 17.02%) -- 9HKO at best
That's accounting for the STAB and 30% boost. Probably the best 4x Ice resistance in the game, but you'd really have to watch for Close Combat though since, with Adamant and LO, it has a chance to OHKO. Lapras is also kind of lacking in usefulness outside of it's 4x Ice resistance now that perma-Hail is gone and people use P-Bond to break Subs instead of Kyu's Skill Link, so you really only want to use it if Refrige Kyu-either is that huge of a threat to the rest of your team. Or if you're running one yourself and want a great Imposter check (just mind your Kyu's coverage).
A somewhat more common option, but a bit shakier...
252+ Atk Life Orb Kyurem-B ExtremeSpeed vs. 252 HP / 252 Def Jellicent: 147-173 (36.38 - 42.82%) -- 97.66% chance to 3HKO
Wouldn't have to fear Close Combat coverage, though Bolt Strike will still be nasty (though, as far as I've seen, everyone's been opting for Close Combat over Bolt Strike). But on the other hand, it'll be harder to switch in safely or keep it up since the E-Speeds still hit it fairly hard.
A third option...
252+ Atk Life Orb Kyurem-B ExtremeSpeed vs. 252 HP / 252 Def Registeel: 87-104 (23.9 - 28.57%) -- possible 5HKO
Would work much better than Jelli for Kyu-Bs who opted for Bolt Strike (most refrige Kyu-Bs I've seen run Fake Out/E-Speed/Coverage/Recovery, Set-up, Spin, or Anti-Sheddy), but Close Combat is an ensured 2HKO. If they do have Bolt Strike, it's an ensured 3HKO with a LO and Adamant. But, because of the next option, Crunch is far more likely if they don't have Close Combat or if they're running two coverage moves. Registeel is just going to laugh at Crunch.
And a fourth option, probably the most common...
252+ Atk Life Orb Kyurem-B ExtremeSpeed vs. 252 HP / 252 Def Aegislash: 87-104 (26.85 - 32.09%) -- guaranteed 4HKO
Mind, Aegislash is fairly common, so if Kyu-B isn't running Close Combat for coverage, or it's running dual-coverage, then that means it's probably running Crunch. And Crunch is an ensured 2HKO. Also, unlike Registeel, Bolt Strike has a 34% chance for a 2HKO with just the LO boost and Adamant.
On all three, King's Shield would probably work pretty nicely. Burning it somehow is great too (any of these three can be Magic Guard Psycho-Shifters if needed). Kyu-B also dislikes hazards, so keeping those up in conjunction with something that walls it will wear it down overtime. There's also Fur Coat, which would drop the damage calcs by quite a bit and ensure that none of them get OHKOed outside of boosts or crits.
Of course, there's always Sheddy and Imposters, but players who know what they're doing will be prepared for both.
And... umm... that quick reply got huge...