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General: Provides defense. Costs 250 redstone and 1500 gold. Shoots small magic bolts at enemies.

Enables: Nothing.

Researches: A spire can be upgraded to a healing spire, fire spire or wind spire for 250 redstone and 3000 gold.

when destroyed: Nothing is disabled, but if base defenses are gone, the base usually quickly follows. Keep the healing spires alive. Note that spires are destroyed easily by enemy siege units such as ballista's, so coms generally dont place much of them.