It's time for another off-meta (bad) pick post ! In a meta where everyone struggles to find good kyurem answer
and people refuse to run levitate bronzong, I decided to start experimenting with the number one sturdiest special wall in the game not named blissey: Regice. Sporting 200 spdef and a resistance to ice without being ground weak, regice seems like the ideal Kyurem switchin... except when you look at everything else: No recovery, no coverage, very limited utility moves (mostly just thunderwave), bad speed, bad damage output... BUT, it does what you want it to do very very well:
252 SpA Choice Specs Kyurem Ice Beam vs. 252 HP / 0 SpD Regice: 60-71 (16.4 - 19.5%) -- possible 7HKO after Leftovers recovery
252 SpA Choice Specs Kyurem Draco Meteor vs. 252 HP / 0 SpD Regice: 172-204 (47.2 - 56%) -- 23.4% chance to 2HKO after Leftovers recovery
These would be good numbers if it wasn't for Regice's complete lack of recovery, however this can be fixed by
huffing insane amounts of copium running it alongside terrain support, hail support for ice body or a wishpasser like Mola (which is coincidentally really good rn). Of course I had to test all three at the same time:
https://replay.pokemonshowdown.com/gen9ou-2099898694
Here's the set I used:

@ Heavy-Duty Boots / Leftovers
Ability:
Ice Body
Tera Type:
Electric
EVs: 248 HP / 8 Def / 252 SpA
Modest Nature
IVs: 0 Atk
- Ice Beam
- Thunderbolt
- Charge Beam
- Thunder Wave
Regice becomes surprisingly sturdy when it has passive recovery (like a bad heatran), especially when you factor in the defense boost from hail. Tera electric allows you to become neutral to every special hit because ground-type special attackers are mostly absent from the tier, being limited to lando which never invests spatk and drops to an ice beam and heatran which you can actually easily 1v1 if terrain or hail is up because Regice is just that specially bulky lol.
I wouldn't say regice is a good pick, but it surprised me by being not completely useless once provided with the right support. In the game I linked, I'd even say it really really pulled its weight. Makes me wonder about using Regirock (or Registeel?) on a terrain team for similar purposes but against physical attackers. I do think if these ever got recover they would shoot up the fucking tiers, maybe not to OU but at least UU. Anyways it was fun to try using Regice. What niche picks have you been trying lately?