Rare Weapon (Firearm), Loading, Range (80/240), Two-Handed, Special 

• This ranged firearm deals 1d4 cold damage, but you don’t add your Dexterity modifier to the damage.  
• Any creature hit by this weapon has their Movement Speed reduced by 10 feet until the start of your next turn. 

Snow Cannonball (Recharge 5-6). You can use your bonus action to make your next attack with this weapon produce a freezing blast. If your attack enhanced by this feature hits, the target and every creature within 10 feet of them must make a DC 14 Constitution saving throw, taking 3d4 cold damage and becoming restrained until the start of your next turn on a failure, or half as much damage and not being restrained on a success. 

Slippery Slope. When you make the attack action, you can replace one of your attacks made with this weapon with this effect.

Instead of targeting a creature, you target a 15-foot square of surface within 80 feet of you, turning it into the “Slippery Ice” difficult terrain until the end of your next turn. This will also create a platform of Slippery Ice on any liquid surface.