Passive mobs that assist the player in combat within the cave

In Minecraft, players must enter a cave shortly after starting survival mode. However, since they likely only have a weak stone sword and a dozen torches, it's difficult to escape group fights with zombies or sniping skeletons. Therefore, we believe Minecraft needs some kind of passive mob that can be encountered with a high probability in caves and tamed using items easily obtainable above ground. Once tamed, these mobs will attack monsters for the player, and unlike wolves, they automatically search for and kill nearby enemies, like golems, without the player having to attack first. However, unlike wolves, their attack power and HP are slightly weaker. While tamed mobs are fighting, players can obtain iron and coal and craft armor to join the fight. If this feature is implemented, exploring Minecraft's caves is expected to become much more enjoyable.