A mud pie is an equipableitem that can be worn in a player's mainhand slot. It is because of this that the mud pie can be considered some sort of weapon, but it does very little damage and has limited uses (i.e. it is not stackable). Rather, it is thrown at other players to decrease their run energy by 50% (although it has no effect on NPCs). It can be obtained by looting baby implings or made using the Cooking skill. You will need to have level 29 Cooking to bake it, and will receive 128 Cooking experience from doing so.
When holding a mud pie players stand and walk in the same way they did before the Evolution of Combat. This ability is shared with the gnomeball and the snowball from the 2012 Christmas event.