Just like the Secret Cow Level in the original Diablo II, the Secret Cow Level is in LoD as well. You must have beaten Baal on the difficulty you want to make the portal for though. 1. Go to Rogue Encampment 2. Insert a Wirt's Leg and a Tome of Townsportal into the Cube and Transmute. 3. Enter Portal. 4. Fight Cows. The cows CAN be difficult to kill with melee characters, so be careful. Paladins and Sorceresses are always helpful here. The cows do not give good experience, but the chances of finding good runes/gems/equipment is better than most places. Also, most of the ''stashes'' and ''chests'' here are good drops as well. WARNING: If you want to make the portal again, DO NOT KILL THE COW KING. If the Cow King is killed in a game where you made the portal, you WILL NOT be able to make the portal for that difficulty anymore.