The disappearance of a Warden in the game occurs under specific circumstances governed by its behavior and the environment. The duration until a Warden vanishes is directly linked to its activity status. If a Warden remains unprovoked and unable to detect any players or noises for a set period, it will burrow back underground.
This despawning mechanic is crucial for maintaining game balance and managing player encounters with this powerful mob. It ensures that the Warden remains a challenging, but not permanently oppressive, presence in the Deep Dark biome. Prior to this despawning feature, players could face Wardens indefinitely, leading to potential frustration and difficulty in progressing through the game.