Diamond Golems spawn rarely in NPC villages, along with 4 other Iron golems. They have a simmilar AI to an Iron golem, but they will go after any hostile mob. They are also harder than an Iron Golem, dealing 300 hearts of damage (an OTK), and has 90000010 hearts (Yes, it is WAAAAAAAAAAY over 9000!). They have the same drops as Iron golems, But instead of Iron, They drop 3-5 diamonds. They also deflect arrows, can breath underwater, and have fire resistance plus blast resistance, thus nullifying Explosion damage, Lava damage, and fire damage. A Diamond Golem's range of attack is 9000 blocks up plus down plus left plus right.
Building one is similar to building Iron Golem but with Diamond Blocks. However, they can destroy Ice and hold roses.
The Diamond Golem looks like an Iron golem, but with colors of a diamond block. There is also no moss; the moss is replaced with ice. It also has blue-purple eyes.
Arrows are useless to Diamond Golems. Mob grinders don't work because Diamond Golems can breathe underwater. Their health is HUGE as well as their range, TNT damage is nullified, fire aspect does not work, and they can OHK an Enderdragon! So how do you kill this thing? Simple; you don't unless you use cheats or use lava though they are very strong (Well you actually have a 1% chance of beating him, but good luck, it's unknown if they can hurt you in creative) but Chuck Norris has a 1 in 100 chance of beating him. When in lava it will take one Minute for it to die.