Tower #2

Level 1, cost = 500 crystals, yield = 2.68%

Level 2, cost = 750 crystals, yield = 2.73%

Level 3, cost = 1120 crystals, yield = 2.74%

Level 4, cost = 1700 crystals, yield = 2.76%

Level 5, cost = 2550 crystals, yield = 2.80%

Level 6, cost = 3820 crystals, yield = 2.82%