Union Bosses can be found in the Pirate Union section and can only be opened by Union Captain or First Mate. There is a 24 hour time frame for union mates to choose their trophy, and 48 hour cool down on each boss. Trophies are awarded on a 1st come basis, so you may have to wait if the number of applied exceeds the number available (better to choose a different trophy that's available and then reapply early in the next 24 hour time frame).
Trophies are awarded at 20:00(Ingametime GMT+7).
You can apply for your next trophy. You can only choose 1 trophy in total, NOT one for each boss.
For each Fight you get at least 50 Pirate Coins (Even if you don't land a single hit)
For each 1k dmg you deal to the boss you gain 1 additional point - means at a total of 950k dealt dmg you will get 1000 Pirate Coins as reward.
The First Boss has a total HP of about 10.000.000 - means each fight will take at least 10% of their life, if you gain 1k Pirate Coins
The Second Boss has a total HP of about 20.000.000 - means each fight will take at least 5% of their life, if you gain 1k Pirate Coins
The Third Boss has a total HP of about 30.000.000 - means each fight will take at least 3,3% of their life, if you gain 1k Pirate Coins
The Fourth Boss has a total HP of about 40.000.000 - means each fight will take at least 2,5% of their life, if you gain 1k Pirate Coins
~ These Values are approximated based on some tests, further testing is necessary to clarify the exact Values.
Where to choose trophies.
Reward for attacking
First boss kill reward.
Second boss kill reward.
Third boss kill reward.
Fifth boss kill reward.