Might have hc-styled pvp?
https://news.blizzard.com/en-us/diablo4/23816540/all-hell-breaks-loose-in-2023-diablo-iv-is-comingQuote
Fields of Hatred. Here, his influence pits mortal versus mortal in designated PvP Zones. If you give into Mephisto’s temptation by marking yourself hostile, you open yourself up to facing the full fury of others who are marked hostile, but should you be successful in striking down your opponent, their spoils shall be yours to claim. These zones are not for the faint of heart, rather for heroes looking to bring renown to their name through blood and zeal!