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Improves Heroes level cap, allow to train Heroes. Improve to increase Heroes experience aqusition rate, also improving the National Treasure increases aqusition rate.

Training Upgrade Cost Edit

Building Level Upgrade Cost
94 Gold x 419,464
Eternite x 393
95
104 Gold x 787,392
Eternite x 543
105
106 Gold x 893,079
Eternite x 570