The name for the first paid expansion of Diablo 4 has potentially been leaked according to a technical build intended for game testing. The revealed name, "Lord of Hatred", has sparked rumors that the expansion revolves around the demon Mephisto, Diablo's older brother and Bhaal. Narrative-wise, the plot reportedly unfolds in Diablo 2's Kurast region. Speculation suggests the addition of a new class, Spiritborn, but there's no clarity on the specifics of this class yet.

The expansion is tipped to introduce a new mercenary system with a talent tree, raids, and the option to create runestones. Nevertheless, these details are yet to be officially confirmed by Blizzard. Note that the original source of these leaks hasn't been clarified in the article, neither the implications for game pricing, release dates or changes in gameplay tactics.