Guild Bosses have two difficulty levels, Normal and Hard.
You can challenge Guild Boss of Normal difficulty twice a day to receive Coins, Guild Coins, Diamonds and random 3-Star Hero Fragments.
Of every 2,000 Guild Activity Points are increased, a chance of challenging a Guild Boss of Hard difficulty is received. You can challenge the Guild Boss of Hard difficulty to receive Coins, Guild Coins, Diamonds and 4-Star Hero Fragments.
You can challenge Guild Boss of Normal difficulty twice a day to receive Coins, Guild Coins, Diamonds and random 3-Star Hero Fragments.
Of every 2,000 Guild Activity Points are increased, a chance of challenging a Guild Boss of Hard difficulty is received. You can challenge the Guild Boss of Hard difficulty to receive Coins, Guild Coins, Diamonds and 4-Star Hero Fragments.