Mega iron golem

A bigger iron golem, and way more powerful. How to summon it is basically the normal way, but a 3x3 square in the middle and one iron block on the middle outside of the left, right, and down. It has the power to one-shot a normal iron golem, and is at least 1.5x as big as one. When you summon it, it has a 1 in 1000 chance of spawning an evil one that can break and interfere with the spawning of another one, and will go on a rampage trying to kill anything and everything that gets in it’s way.