Knights of Nations

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Introduces the Nation transfer function. Players can transfer to other countries (for a fee).
Introduces the Dragon Soul system (unlocks at Level 65). Collect dragon balls to boost various stats.
Allows you to activate equipment sets, increasing equipment power. More set items, more power!
Improves the power of wings.
Introduces skill boosts, pet power improving equipment and legion expeditions, which you can join to gain EXP and items.