Skullrock hero is a free to play hero which you gain by doing Skullrock Hell Events.
See the page labelled "Skullrock Event" to find out how to gain this hero.
Gold Attributes:
Hero ATK up by 20%
Hero Crit rate up by 25%
Barracks Training SPD up by 20%
Increase Army ATK by 20%
Skin Gold Attribute:
Increase Army HP by 25%
Collecting Shards:
Complete 3 stages of Skullrock Hell Events
Collecting Skin Shards:
Complete 3 stages of the All day events.
Note: Skullrock is a useful hero to have but takes time to upgrade.
He helps towards troop making and Army HP/ATK.