How to reach the Secret Cow Level You must finish the game first (Kill Diablo in D2, Kill Baal in D2X), and then go back to Act I on the same difficulty level, and execute the cube recipe of Wirt’s Leg + a Town Portal Tome, while your character is standing in the Rogue Encampment. You do not need to carry around Wirt’s Leg forever; just go back to Tristram any time and click his…