Ancient Zombies are Level 2000 enemies found in the Trial of Carnage, where they serve as a mandatory combat challenge for progressing the Ghoul V4 race trial. They are not optional mobs, and defeating them is required to move forward in this late-game trial segment. Their presence makes them a core checkpoint in Ghoul V4 progression rather than a side encounter.

In combat, they use basic Combat melee attacks, but their real threat comes from mobility and defense tools. They can use Flash Step to quickly reposition and Aura, which makes them harder to counter with standard elemental avoidance. Because of this, Elemental Reflex does not work against them, forcing players into direct fights instead of relying on passive dodging or immunity mechanics.

Ancient Zombies usually spawn in groups and often appear alongside Ancient Vampires, creating continuous wave style encounters. This combined pressure makes fights harder to control, as multiple enemies stay active at once and reduce safe spacing. Players must manage crowd pressure and movement carefully, especially during longer trial waves where both enemy types of overlap.