The level of the Wirt's Leg you acquire must match the level of the Secret Cow Level you wish to open. Open a game in same difficulty level as the Secret Cow Level you wish to open. You will just need to go through these opening steps first each time. Back in early D2, you could not open the level again if you killed The Cow King, but this restriction was removed and you can open a Secret Cow Level whenever you choose. You need to complete all acts in Normal to open Secret Cows, all Nightmare acts for Nightmare Secret Cows, etc. You can only open the Secret Cow Level for a difficulty level you've completed. There are good reasons to farm it on every level, not just on the highest level possible. However, it is most often farmed without Magic Find gear for socketed Normal items, runes, jewels, and gems. The Secret Cow Level is one of the most popular treasure farming levels in Diablo II: Resurrected, and with good reason: there are tons of great drops with chances for set items, uniques, and rares. This guide will show how to open the Secret Cow Level in Diablo II: Resurrected Patch 2.7 & Ladder Season 4, and highlight the best strategies and classes to make the most of this treasure area.

Diablo 2 how to open cow level