Iron Golem

Iron Golems are utility Mobs that were added in Update 0.12.1. They are powerful Mobs that attack Hostile Mobs to protect Villagers or the Player.

Spawn
An Iron Golem will spawn if there are at least 10 Villagers and 21 doors in a Village. If the population of the Village is multiplied by 2, another Iron Golem will spawn. They can also be created manually by the Player by placing 4 Blocks of Iron in a T-Shape and placing a Pumpkin on top. Jack O'Lanterns also work.

The Pumpkin or Jack O'Lantern must be placed last in order to create an Iron Golem.

Behavior
Iron Golems attack all Hostile Mobs except Creepers. If in a Village, an Iron Golem will not walk away from the Village because if it walks out of the Village "boundaries" then its A.I. will take it back to the center of the Village.

Occasionally, Iron Golems will give Baby Villagers a Poppy, which is why they drop Poppies when killed.

Trivia

 * Iron Golems were added in Update 0.12.1 along with Snow Golems.
 * When the Iron Golem attacks a Mob, the Mob will be knocked into the air.
 * This can indirectly kill the Mob by fall damage.
 * This may also cause Mobs to fly over Fences.
 * They are immune to fall damage, like Ocelots, Snow Golems, Chickens, and large or medium Slimes.
 * Naturally spawned Iron Golems will attack the Player if he/she attacks them or hits a Villager, or if the Player has a very low popularity in the Village.
 * However, they will become passive if they are submerged in Water.
 * If the Iron Golem is Player spawned, it will never attack the Player.
 * Iron Golems don't drown even if they are completely submerged.
 * Iron Golems currently have the second highest Health of all Mobs in Minecraft PE, the first being the Wither.
 * Iron Golems are unable to move if they are underwater.
 * In addition, they can't stay afloat.
 * An Iron Golem's behavior of giving a Flower to a Baby Villager is a reference from an animated film called "Laputa: Castle In The Sky."
 * Looting Enchantments on Swords do not affect the amount of drops from Iron Golems.
 * They can be Leashed.
 * As of Update 0.16.0 Iron Golems attack the Player in all Difficulties, when provoked.