Golem

The Golem is an unobtainable Mythical pet released in the Beanstalk Event update, and the word that defines it is unobtainable: there is currently no egg, shop, or active source that produces one. That makes the usual "is the egg cost worth it" calculus moot, because there is no egg to buy and no odds to weigh. It exists as a closed-supply curiosity rather than a farmable target.

Because it shares its Beanstalk origins with the event's headline creatures, the Golem reads as a thematic side-piece, a hulking stone guardian that fits the fairy-tale-fortress mood of that update. Its Mythical tier puts it high on the rarity ladder, and the unobtainable status means whatever number exists is effectively frozen, which is the single biggest driver of any pet's long-tail value.

My take: do not plan a grind around the Golem, because there is nothing to grind. If you want one, the trade market is the only avenue, and its price is dictated by scarcity and collector demand rather than any hatch rate. For most players it is a museum piece, interesting to know about but not a realistic acquisition.