Serpentshrine Cavern opens on Warborn TBC

Warborn WoW announced on 25 October 2025 that its first Tier 5 raid, Serpentshrine Cavern, is open on the server's progressive Burning Crusade realm. The raid has six bosses, from Hydross the Unstable and The Lurker Below through to Lady Vashj, and full Tier 5 loot tables for guilds that have been working through the Karazhan and Gruul's Lair phase.

You need attunement to get in. That means completing the classic Vashj attunement chain, including Heroic Slave Pens and the other prerequisite steps, before your guild's first pull on Hydross. The timing follows the original TBC progression, with Tier 4 gear from Karazhan, Gruul and Magtheridon as the expected entry point.

Warborn bills itself as a progressive 3.3.5a-based server that recreates earlier expansions with staged raid releases, dungeons and arena seasons, and it announced this raid through its Discord and community news outlets, as it does with every opening. Serpentshrine Cavern arrives as a progression step of its own rather than alongside Tempest Keep, so guilds have a single new instance to focus on.