Gargantor (Metal King) Is a free to play hero
Gold Attributes:
Hero DEF up by 30%
Construction SPD up by 20%
Increase Infantry Brigades Deployed by 6
Increase Infantry DEF by 50%
Hero Skin Bonus:
Increase Infantry HP by 50%
Collecting Hero Shards:
Sweeping Elite 2-3 in Campaign
Sweeping Elite 5-1 in Campaign
Sweeping Elite 6-2 in Campaign
From Defense Chest (VIP Daily Chest)
Collecting Skin Shards:
Sweeping Elite 5-4 in Campaign
Sweeping Elite 7-4 in Campaign
From Defense Chest (VIP Daily Chest)