Minecraft wiki entry for Player_versus_Player, associated text: Tip: Snowballs are cheap, easy-to-mass-produce armor killers! It is highly recommended that snow golems are kept in a base for this purpose. Unfortunately it takes a little less than 4 chests of snowballs to destroy diamond armor. However, it can easily destroy gold armor with its low durability. In a pinch, eggs can be used as a substitute, albeit with some disadvantages (including the baby chickens that can be spawned).