Alchemist's Frost

A thin liquid that grows extremely cold when exposed to air, alchemist’s frost functions like alchemist’s fire except that it deals 1d4 points of cold damage on a hit, rather than fire damage. It deals no additional damage after the initial damage. In addition the liquid grows ice crystals as it freezes, impairing movement, reducing the affected creature's movement speed by 10' (to a minimum speed of 0, causing flying creatures to fall unless they are able to hover (See MM for information on Hovering)) until the creature or one of its allies uses an action to make a DC10 strength check to remove the ice.