Sand Spire Upgrades (sand circle units only)

	name	costs	prerequesites	effects
	Stone Bite	100	large city	+20% melee attack +20% trample attack +15% range attack
	Rock Bite	200	Stone Bite, great city	+20% melee attack +20% trample attack +15% range attack
	Tough as Stone	100	large city	+10% health +5% speed
	Tough as Rock	200	Tough as Stone, great city	+10% health +5% speed
	Lush Circle of Sand	100	large city	extra health act as supply units
	Glass Bolts	125	large city	Desert Walkers: gain range attack gain extra health
	One with the Sand	125	great city, Glass Bolts	Desert Walkers: gain One with the Sand tactic gain extra health

Sand Spire Upgrades (upgrades effect ALL units)

	name	costs	prerequesites	effects
	Mystic Mines	50	none	non combat units: +5% health mines: output (+6), health and attack increased
	Enchanted Mines	150	large city, Mystic Mines	non combat units: +10% health mines: output(+8), health and attack increased
	Enchanted Mines	300	great city, Enchanted Mines	non combat units: +15% health mines: output(+10), health and attack increased
	Earth Guide	2525	none	all units gain 5% speed and LOS
	Unerring Earth	200150	large city, Earth Guide	all units gain 5% speed and LOS
	Shifting Sand	75100	none	decrease all unit costs by 5%
	Flowing Sand	150200	large city, Shifting Sand	decrease all unit costs by 15%