How do you use them

Simply build a Java iron farm in a 9x9 area; this is the preferred method. Afterward, ensure that the villagers have the correct job blocks for them to operate efficiently. For one iron golem, you'll need three villagers with the professions of "farmer," "fisherman," and "shepherd" for the first set, "fletcher," "librarian," and "cartographer" for the second set, "cleric," "armorer," and "weaponsmith" for the third set, and "toolsmith," "butcher," and "leatherworker" for the fourth set. Iron golems will spawn approximately every 45 seconds; remember to place the Iron Farm Origin Block on the spawn platform. Please watch the tutorial video provided above for further assistance.