Some players previously reported that in the later stages of the game, a large number of gold coin resources could not be used effectively.
Therefore, a summoning skill has been added to the fort, which can summon a melee robot hero: Iron Guard. The iron guard has high health, high armor, and the basic damage is range damage. It can release a fan-shaped shield, and it can also release a gain range buff to strengthen the armor and attack power of surrounding units.