Frosty creations only appears during certain events and may not be currently found in game.
Frosty creations are snowmen who have escaped from the Wizards' Tower, as part of the 2011 Christmas event. When killed they drop 5 snowballs or a piece of coal. They can be found randomly throughout Gielinor, often in groups. They were first mentioned in the 2011 Christmas update, but had been seen prior to the update. The creations can spawn in such large numbers that they cause lag in areas that are already heavily populated.