Diablo 4 is collaborating with yet another major franchise in Season 12: Season of Slaughter. This time, the crossover is with Doom: The Dark Ages, bringing the Slayer’s aesthetic to Sanctuary through thematic rewards, premium cosmetics, and free emblems during a limited-time event.

This event will begin on March 11, 2026, at 10 am PT and is set to run until 10 am PT on March 18, 2026.

Everything we know about the Doom: The Dark Ages collaboration

This crossover introduces the “most expansive earnable Reliquary yet” to Diablo 4 Season 12. During its run, players can battle enemies to earn Dark Ages Currency, a new currency tied to the Doom: The Dark Ages event.

To earn Dark Ages Currency, players must slay Elite and Champion enemies. The currency can then be spent on Doom: The Dark Ages-themed cosmetics from the event reliquary.

The reliquary contains 10 unique transmogs inspired by the Doom Slayer’s arsenal. Each cosmetic costs 100x Dark Ages Currency. Examples include:

• Shield Saw cosmetic skin
• Doom Slayer’s Flail weapon cosmetic

These items give your character a Doom-inspired makeover, perfect for facing Sanctuary’s demons.

Once you have acquired all the rewards, you will be able to claim the bonus Forsaken Gates Town Portal.

Doom Chests: Boss drops

In addition to the reliquary rewards, players can earn loot by engaging bosses. Lair Bosses in Season 12 have a chance of dropping Doom Chests, which contain Unique items with Doom Crucible-themed transmogs. This provides players with special cosmetic versions of gear and an incentive to challenge high-tier bosses in the Season of Slaughter.

Also read – Diablo 4 Season 12: The strongest builds, based on PTR meta

Free Doom: The Dark Ages emblems in Diablo 4 Season 12

Blizzard Entertainment is also giving away multiple free emblems during the event period via the in-game shop. You can claim them on the following dates and timings:

• March 11, 12 pm PT – Dark Before the Dawn
• March 13, 12 pm PT – Grandeur of the Gutted
• March 15, 12 pm PT – Rip and Tear

These emblems are completely free; you only need to log in to the game in order to claim them.

Also read – Diablo 4 Season 12 PTR: Best builds for every class

Paid premium cosmetics

Alongside free rewards, you can also obtain optional paid cosmetics from the in-game shop starting from March 12, 2026, at 12 pm PT. The items include:

• Doom Slayer Armor (cross-class armor set)
• Mecha Dragon Serrat cat mount skin
• Cacodemon pet

Blizzard has not yet confirmed the prices of these cosmetics. However, based on previous crossover cosmetics, they may range between $20 and $30 each.

Also read – D4 Lord of Hatred will bring back iconic crafting item from D2

The Doom: The Dark Ages collaboration will launch with Season 12: Season of Slaughter, which also introduces Bloodied Items, the Killstreak system, and the player ability to temporarily transform into The Butcher, complete with unique skills and gameplay mechanics.

Players will also be able to check out the new Paladin Class (from the upcoming Lord of Hatred expansion) up to level 25. With free reliquary items, Doom cosmetics, and a Paladin class trial, Season 12 is shaping up to be one of the most exciting seasons yet in Diablo 4.

For more details on Diablo 4 Season 12, visit the game’s official website.

Check out our other guides related to the game: