GamesAction RpgDiabloDiablo 4Diablo 4 Vessel of Hatred is bringing back the series-favorite mercenary system to cover the “soft spot” that Blizzard says exists in each and every class buildWhen you purchase through links on our site, we may earn an affiliate commission.Here’s how it works. GamesAction RpgDiabloDiablo 4Diablo 4 Vessel of Hatred is bringing back the series-favorite mercenary system to cover the “soft spot” that Blizzard says exists in each and every class buildWhen you purchase through links on our site, we may earn an affiliate commission.Here’s how it works. When you purchase through links on our site, we may earn an affiliate commission.Here’s how it works. (Image credit: Blizzard) Diablo 4is bringing back the RPG series' beloved mercenary system in Vessel of Hatred to help you “round out your build.” That comes from Diablo’s general manager Rod Fergusson, who says the team opted to bring the system back – as opposed to …