And this is an important addition in Diablo 2 Resurrected, cause you can kill the Cow King, and still replay the Cow level as much as you want. But you can join players who are ready to do secret cow level runs, and carry you ahead. The only problem to access it yourself is by killing Baal. Secret Cow Level is hands down the best way to jump from lev 20 to 24 in a jiffy. You could keep leveling up in Tal Rasha’s Tomb runs, but considering the capped exp you earn, you need to move to the next phase. Join a group of similar-minded players and you can easily rank up to level 20 in multiple runs. This can be accessed through the sixth and final quest of Act 2 called The Seven Tombs. The next phase of leveling in Diablo 2 Resurrected involves you running the “True Tomb of Tal Rasha”. Cause Trist Runs will not grant good enough experience beyond level 15. Keep playing this level to easily reach level 15 and then move on. Once done you can either host or join other players with game names like Trist Run, Tristam 1, and so on.

This will be unlocked once through completing The Search for Cain quest in Act 1, where you have to visit Tristram to rescue Deckard Cain from the terrors of the hell unleashed. Tristram in Diablo 2 Resurrected can be accessed through a special portal opened within the circle of Cairn Stones in the Stony Field.

Diablo 2 leveling guide