Spire

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The Zerg Spire produces the genetic code that allows Larvae to morph into Mutalisks or split into pairs of Scourge. The Spire also serves as the upgrade facility for the Zerg aerial units, upgrading the Flyer Attack and the Flyer Carapce.

Zerg Units and Structures of StarCraft/Brood War v • e

Ground units Larva Drone Zergling Hydralisk Lurker (BW) Defiler Ultralisk Air units Overlord Mutalisk Guardian Scourge Queen Devourer (BW) Infestation units Broodling Infested terran Transition units Egg Lurker egg Cocoon Basic buildings Hatchery Extractor Evolution chamber Spawning pool Hydralisk den Advanced buildings Lair Hive Spire Greater spire Queen's nest Nydus canal Defiler mound Ultralisk cavern Infested command center Defenses Creep Creep colony Spore colony Sunken colony Scrapped Fungal colony Mutation chamber Mutation pit Nydus pit Scoria