Pirate Trial is a place where player’s strength will be tested, 100 stages in total. A boss-level pirate will guard here every 5 stages. Killing BOSS will get big bonus. When winning, there is a set chance that gems will drop. Every 10 stages will drop extra precious material and gems.
Players will lose nothing if they fail in the Pirate Trial, so they can try to challenge different battles with different formations. If they win, then next time they can use the Wipe-Out until the challenged stages are clear and get the corresponding reward.