Big Slapper (Vaporeon) @ Tera Shard  
Ability: Mud Wash  
Tera Type: Ground  
EVs: 4 HP / 252 SpA / 252 Spe  
Serious Nature  
IVs: 0 Atk  
- Mud-Slap  
- Ice Beam  
- if you need to run a third move you're a coward