When did Season 2 of Diablo IV run?

Season of Blood ran from October 17, 2023 to January 23, 2024. This was the same day as the Steam launch — bringing a large influx of new players.

What was Season 2's mechanic?

Vampiric Powers — 22 powers unlocked via seasonal quests and the Blood Harvest overworld event, upgradable to rank 3 with Potent Blood. Max 5 equipped, each tethered to a Pact (Ferocity/Divinity/Eternity). Pact Armor provided the pact values needed to slot powers.

Who was the Season 2 boss?

Lord Zir, Avatar of Blood — a level 80 Lair Boss summoned with Exquisite Blood from World Bosses and Legion Events. Zir remained in the endgame boss rotation permanently.

Diablo IV

Diablo IV Season 2 (October 2023) archive. Vampiric Powers, Lord Zir, 5-boss endgame ladder, Steam launch, and the community redemption arc.

Season Archive Oct 17, 2023 → Jan 23, 2024

Season 2 — Season of Blood

The redemption season. Historical archive.

After Season 1's Patch 1.1.0 backlash, Blizzard delivered redemption. Season of Blood shipped October 17, 2023 alongside the D4 Steam launch, bringing Vampiric Powers, a fully-realized endgame boss ladder, and the biggest system rework to date. Peak Steam concurrency hit ~28,800 players in November, and the community declared D4 back on track.

Seasonal Mechanic — Vampiric Powers

22 vampiric powers unlocked through seasonal quests and the Blood Harvest overworld event. Powers upgraded to rank 3 with Potent Blood. Players equipped up to 5 powers, each requiring Pact Armor values to slot — Ferocity, Divinity, or Eternity pacts.

The 5-Boss Endgame Ladder

Season 2 launched the full endgame boss structure that persists today:

Echo of Varshan — Malignant mats
Grigoire — Living Steel (Helltide)
Lord Zir — Exquisite Blood
Beast in the Ice — Distilled Fear (NMD)
Duriel, King of Maggots — Shards + Mucus Eggs — Uber Unique farm

Patch 2.0 Systems Overhaul

Patch 1.2.0 reworked resistances, Paragon Glyphs, enemy damage/HP balance, and dramatically accelerated the leveling XP curve. Stronghold rewards were buffed. New uniques: Sanguine Brace, Black River, Blood Moon Breeches, Ring of the Ravenous.