Mamoswine @ Focus Sash  
Ability: Oblivious  
Level: 50  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
IVs: 0 SpA  
- Icicle Crash  
- Protect  
- High Horsepower  
- Ice Shard

Unown
Options:
- offensive: Earthquake, Rock Slide, Superpower

Unown
Offensive calcs:
- 252+ Atk Mamoswine Ice Shard vs. 4 HP / 0 Def Landorus-T: 168-204 (101.8 - 123.6%) -- guaranteed OHKO
- 252+ Atk Mamoswine High Horsepower vs. 0 HP / 0 Def Mega Empoleon: 174-206 (109.4 - 129.5%) -- guaranteed OHKO
- 252+ Atk Mamoswine Icicle Crash vs. 0 HP / 0 Def Moltres-Galar: 176-210 (106.6 - 127.2%) -- guaranteed OHKO
- 252+ Atk Mamoswine High Horsepower vs. 236 HP / 4 Def Incineroar: 194-230 (97 - 115%) -- 81.3% chance to OHKO