Hive

The Hive is the key that unlocks the final stages of Zerg evolution. Protected by a dense exoskeleton and granted full access to the Overmind's pool of knowledge, it continues to provid the same functionality that it has since it was a Hatchery (birthing Larvae, maintaining Creep, and digesting minerals/gas). It can mutate any of the same upgrades it could when it was a Hatchery or Lair (Burrow, Ventral Sacs, Antennae, and Pneumatized Carapace) if they have not been researched yet. Once the Hive is present, the Cerebrate commanding it has the potential to unleash the full fury of the Zerg.

StarCraft II
The Hive reappears in StarCraft II.

It costs 200 minerals plus 150 Vespene and requires a Nydus Warren to morph. It has 2500 hit points.