Being a vampire is thirsty work, as we'll soon find out in Diablo 4's Season 2: Season of Blood. To make the most of your new Vampiric Powers, though, you'll want to know about Vampiric Pacts — also known as Blood Pacts- armor augments that allow you to activate the Powers you equip!
Blizzard has released a short video showcasing the new seasonal mechanic, breaking down everything from how you acquire Vampiric Pacts to why you need them:
Vampiric Pacts will become a system seasonal players need to be intimately familiar with, as they seem to be the building blocks of all Vampiric Powers.