Frost Grenade
Weapon, rare

This small metal sphere is the size of a fist and weighs 5 ounces.

You can use an action to activate the grenade with the press of a button and throw it up to 60 feet. The grenade explodes, creating a sphere of frost, on impact and is destroyed. Each creature within a 20-foot radius of where the grenade landed must succeed on a DC 14 Dexterity saving throw or take 8d8 cold damage. Any creature that failed the save is frozen in ice and paralyzed for 1 minute. Creatures that succeeded on the save take half damage. A paralyze creature must succeed on a DC 14 Strength saving throw to break free from the ice.

The sphere of frost covers the ground with ice, creating difficult terrain for 1 minute. Creatures walking over the ice must succeed on a DC 14 Dexterity saving throw or fall prone.

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Image: Futuristic Grenade by Matt Rody