Groudon @ Red Orb  
Ability: Desolate Land  
Tera Type: Ground  
EVs: 248 HP / 140 Def / 120 SpD  
Impish Nature  
- Precipice Blades  
- Spikes  
- Toxic  
- Overheat  

Yveltal @ Choice Scarf
Ability: Dark Aura
EVs: 204 Def / 80 SpA / 224 Spe
Tera Type: Dark
Timid Nature
- Foul Play
- Oblivion Wing
- Defog
- U-turn

Zygarde @ Leftovers
Ability: Power Construct
EVs: 252 HP / 252 Def / 4 SpD
Tera Type: Fairy
Impish Nature
- Coil
- Glare
- Thousand Arrows
- Rest

Ho-Oh @ Heavy-Duty Boots  
Ability: Regenerator  
Tera Type: Grass  
EVs: 248 HP / 204 Def / 56 SpD  
Impish Nature  
- Sacred Fire  
- Toxic  
- Defog  
- Whirlwind  

Marshadow @ Choice Band  
Ability: Technician  
Tera Type: Ghost  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Rock Tomb  
- Spectral Thief  
- Shadow Sneak  
- Low Kick  

Any Calm Mind Arceus form not weak to Water