Spire

	Cost: 200 150 Build time: Very Long Hit Points: 600 Energy: 0 Ground/Air Attack: 0/0 Natural Armor: 1 Armor Type: Heavy Size: 2x2 Requires: Lair Hotkey: S
Produces: None
Researches: Flyer Attack Level 1 100 100 Level 2 175 175 Level 3 250 250 Flyer Carapace Level 1 100 100 Level 2 175 175 Level 3 250 250
Evolves To: Greater Spire 100 150
Description: The Spire allows for upgrades for flying units, and it also allows the production of Mutalisk and Scourge, useful Zerg flying attack units.