That's a good idea! Lol I guess I'm not the only one still under the influence of the new year celebrations...
Landorus-T @ Leftovers | Intimidate
Adamant | 200 HP / 64 Atk / 244 Def
- Stealth Rock
- Stone Edge
Synergizes decently with our actual three pokemon: we already have two resistances to Ice, two to Water, so Lando's weaknesses are not that much concerning. It also brings an additional resistance to Fighting, and although it's neutral to Rock, it can take 2 CB Stone Edges from Terrakion and retaliate back with EQ. SR is a nice move for obvious reasons, Stone Edge and U-Turn allow it to complete a TurnTurn (lol) core with Celebi, and to hit Kyurem somewhat (around 50%, but it doesn't pack Ice attacks and won't appreciate being Intimidated before it has a chance to Sub, so that should be enough anyway. Also EQ always break Subs anyway, so...). The main selling point of this set is being able to handle opposing physical hard hitters without giving up momentum or offensive pressure (it has, after all, 376 Attack and a great Ground STAB).