This continued on to Diablo 3, with the return of the Cow King, but now as a ghost. Within the farm is the Cow King which serves as the level’s boss. Well-equipped players should have no problems mowing down these mad cows, but they could still get overwhelmed just by the sheer number of the mobs. Upon arriving, they will be greeted by herds of axe-wielding Hell Bovines. Players can open a portal to the Secret Cow Level which is also known as the Moo Moo Farm. What started as just a rumor about accessing a secret level involving a cow’s corpse, the Secret Cow Level has first manifested in Diablo II when the devs decided to pick up the joke and actually include it in the game as some sort of an Easter Egg content. The Secret Cow level had a couple of iterations up until Diablo 3, so players are also wondering if a Diablo Immortal Cow Level also exists. What made this level popular with the players aside from the level’s absurdity is that it was a good place to grind for XP and farm for consumables. It’s basically a secret level that is populated by cows that are out to kill you. The Secret Cow Level has been a running gag in the Diablo community way back in the early Diablo games.

Diablo 2 cow level guide