Alchemist’s Ice

A bottle of Liquid Nitrogen that can be thrown. Make a ranged attack if throwing it at an enemy, the bottle shatters at their feet and freezes the ground in a 10 ft radius. Creatures that try to move within range must succeed on a DEX saving throw or slip and be knocked prone. (Targets are immune if they have spent an action getting up, as they regain balance)

Ice thaws after 2 of you’re turns, at the end of you’re turn.

Any fire Item/attack/spell that affects the environment can melt the ice.