The lurker den appears in the multiplayer of Legacy of the Void. It is again required to produce lurkers.[2] As of Patch 4.0, it can be morphed from a drone rather than a hydralisk den.
Upgrades
Adaptive Talons
Reduces Lurker burrow time from 2 to 1.07 seconds.
The lurker den and lurker, as well as the base hydralisk strain, are exclusive to Kerrigan in Co-op Missions. The lurker den and lurker are unlocked when Kerrigan reaches Level 5. Ecxept the multiplayer, the lurker den morph into hydralisk den. Upgrades for the lurker become available when Kerrigan reaches Level 6.
Upgrades
Muscular Augments
Increases hydralisks movement speed by 25% and attack range by 1.
The lurker den will be altered in an upcoming patch to be built directly by drones, rather than being mutated from a hydralisk den. The "Digging Claws" upgrade will be researched here.[4]