When you enter the last Zone at all levels, you will fight against Guards of the Enemy's castle, watch out 
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for the Guards, they have more power than normal Warriors, create Long Range Warriors or Air Warriors 
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to kill them. Destroy Enemy Castles to clear the last Zone to win the Level, and go to the next Level.
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You should buy Stronger Warriors at higher prices, one Strong Warrior is more powerful than 2 Weak 
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Warriors at the same price. Don't spend your money to create 2 Weak Warriors, collect your money to 
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create 1 Strong Warrior.
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Air Warriors are stronger than Land Warriors, but they may lose your money. When Land Warriors 
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damage the Enemy's shield, you will get MORE money than if Air Warriors damage the Enemy's shield.