Actually, keep ice shard and freeze dry, but no icicle crash. Cause if you're up against a water type and the sash is activated and mamoswine does big damage with freeze dry, then use ice shard to get some extra damage
Swifter(you) sent out mamoswine!
Opposing trainer(I'll use myself :)) Dragoon sent out samurott!
The opposing samurott used surf!
It's super effective!
Mamoswine held on with its focus sash!
Mamoswine used freeze dry!
It's super effective
The opposing samurott held on with with its focus band!
Mamoswine used ice shard!
It's not very effective!
The foes samurott fainted!
Player beat dragoon!